feat(ci): catalogue-drift gate for @RequirePrivilege/@RequireRole literals (ADR-0025)

Phase 3 of the ADR-0025 phasing per its §"More Information" §347:
a small CI gate that asserts every string literal passed to the
authorization decorators belongs to the closed catalogue declared
in libs/shared/auth/src/lib/authorization.types.ts.

The TypeScript signature on the decorators already enforces this
at compile time — the new gate is defence-in-depth against escape
hatches (`as Privilege` casts, hand-edits to the type union
without updating the runtime constant). It runs in <1s, so it
rides the existing `check` CI job rather than starting its own.

Implementation:
- scripts/check-catalogue-drift.mjs: TypeScript compiler API.
  Parses authorization.types.ts to extract the catalogue arrays,
  walks every .ts file under apps/ and libs/, finds each
  CallExpression whose callee identifier matches @RequirePrivilege
  or @RequireRole, validates every string-literal argument.
  Non-literal args (variable indirection) are skipped on purpose —
  the TypeScript signature catches them at compile time and the
  gate's value-add is on literal misspellings. Generated gRPC
  stubs under apps/portal-bff/src/grpc/gen are skipped (their
  `roles[]` field is a wire-format unrelated to the catalogue).
  Reports grouped by file with line:column for each violation,
  exits 1 on drift.
- scripts/check-catalogue-drift.spec.mjs: 13 tests via node:test
  (built-in, no Vitest dependency). Covers catalogue parsing,
  file-level violation detection, workspace-wide aggregation,
  skipped folders, gen-stub exclusion, line/column reporting.
- package.json: ci:catalogue-drift + ci:catalogue-drift:test
  scripts.
- .gitea/workflows/ci.yml: the `check` job now runs the gate's
  unit tests (first, to fail fast if the gate itself is broken)
  then the gate against the live workspace.

Self-tested by injecting `RequirePrivilege('Portal.RogueDrift')`
and `RequireRole('rogue-role-x')` into an existing spec — both
caught with file:line:column and exit code 1.

Test plan:
- pnpm ci:catalogue-drift:test: 13/13 green.
- pnpm ci:catalogue-drift: clean (4 privileges, 24 roles).
- pnpm nx affected -t format:check lint test build: no project affected (script lives outside Nx).

scripts/check-catalogue-drift.mjs

@@ -0,0 +1,273 @@
+#!/usr/bin/env node
+/**
+ * Catalogue-vs-code drift gate per
+ * [ADR-0025 §"Confirmation"](../docs/decisions/0025-authorization-model-privileges-roles-scopes.md).
+ *
+ * Asserts that every string literal passed to the authorization
+ * decorators in the codebase belongs to the closed catalogue
+ * declared in `libs/shared/auth/src/lib/authorization.types.ts`:
+ *
+ *   - `@RequirePrivilege('Portal.X', …)` → every arg ∈ PRIVILEGES
+ *   - `@RequireRole('rh', …)`            → every arg ∈ FUNCTIONAL_ROLES
+ *
+ * The TypeScript type system enforces the same constraint at
+ * compile time — the decorator signatures are typed against the
+ * `Privilege` / `FunctionalRole` literal unions — so the gate is
+ * defence-in-depth against escape hatches:
+ *
+ *   - explicit `as Privilege` casts (`'Portal.Foo' as Privilege`),
+ *   - indirection through a `string`-typed local
+ *     (`const slug = 'rh'; @RequireRole(slug)` — non-literal
+ *     args are skipped here, but the gate at least catches the
+ *     literal misspellings),
+ *   - and the rarer case where a developer hand-edits the
+ *     catalogue type union without updating the runtime constant.
+ *
+ * Implementation: the script parses the catalogue file and every
+ * `.ts` file under `apps/` and `libs/` with the TypeScript compiler
+ * API. For each `CallExpression` whose callee identifier matches
+ * one of the decorator names, every string-literal argument is
+ * checked against the catalogue. Non-literal arguments are
+ * skipped silently; the gate is best-effort for those, but they
+ * are caught by the TypeScript signature anyway.
+ *
+ * Exit code: 0 if no drift, 1 with a grouped report if drift is
+ * found. The script does not consume any env vars; running it
+ * directly (`node scripts/check-catalogue-drift.mjs`) and via
+ * `pnpm ci:catalogue-drift` are equivalent.
+ */
+
+import { readFileSync, readdirSync, statSync } from 'node:fs';
+import { dirname, join, relative, resolve } from 'node:path';
+import { fileURLToPath } from 'node:url';
+import ts from 'typescript';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = dirname(__filename);
+const WORKSPACE_ROOT = resolve(__dirname, '..');
+
+const CATALOGUE_PATH = join(WORKSPACE_ROOT, 'libs/shared/auth/src/lib/authorization.types.ts');
+
+/**
+ * Decorator name → catalogue array name. Adding a third decorator
+ * (per ADR-0025's anticipated growth) is one line here plus the
+ * matching test fixture.
+ */
+const DECORATOR_TO_CATALOGUE = {
+  RequirePrivilege: 'PRIVILEGES',
+  RequireRole: 'FUNCTIONAL_ROLES',
+};
+
+/**
+ * Folders to skip when walking the workspace. Stays small on
+ * purpose: every other path under `apps/` and `libs/` is fair
+ * game for catalogue references, including specs (the persona
+ * matrix in `auth-guards.persona-matrix.spec.ts` is a deliberate
+ * usage and must stay in sync).
+ */
+const SKIPPED_DIRS = new Set([
+  'node_modules',
+  'dist',
+  'coverage',
+  '.nx',
+  '.angular',
+  '__screenshots__',
+]);
+
+/**
+ * Files / subpaths to skip outright. The generated gRPC stubs
+ * under `apps/portal-bff/src/grpc/gen/` carry their own
+ * `roles[]` field that has nothing to do with the ADR-0025
+ * functional-role catalogue — skipping the whole dir keeps the
+ * scanner focused on hand-written code.
+ */
+const SKIPPED_SUBPATHS = ['apps/portal-bff/src/grpc/gen'];
+
+/**
+ * Parse `authorization.types.ts` and extract the catalogue
+ * arrays as `Set<string>` keyed on the constant's name.
+ * Returns `{ PRIVILEGES: Set, FUNCTIONAL_ROLES: Set }`.
+ *
+ * Exported for the spec — keeps the parser logic testable without
+ * spawning the CLI.
+ */
+export function extractCatalogues(sourceFilePath = CATALOGUE_PATH) {
+  const text = readFileSync(sourceFilePath, 'utf8');
+  const sourceFile = ts.createSourceFile(sourceFilePath, text, ts.ScriptTarget.Latest, true);
+  const out = {};
+
+  for (const stmt of sourceFile.statements) {
+    if (!ts.isVariableStatement(stmt)) continue;
+    for (const decl of stmt.declarationList.declarations) {
+      if (!ts.isIdentifier(decl.name) || !decl.initializer) continue;
+      const name = decl.name.text;
+      if (!Object.values(DECORATOR_TO_CATALOGUE).includes(name)) continue;
+
+      // Catalogues are declared as `[...] as const`; strip the
+      // type assertion to reach the array literal.
+      let init = decl.initializer;
+      if (ts.isAsExpression(init)) init = init.expression;
+      if (!ts.isArrayLiteralExpression(init)) continue;
+
+      const values = new Set();
+      for (const el of init.elements) {
+        if (ts.isStringLiteral(el) || ts.isNoSubstitutionTemplateLiteral(el)) {
+          values.add(el.text);
+        }
+      }
+      out[name] = values;
+    }
+  }
+
+  for (const expected of Object.values(DECORATOR_TO_CATALOGUE)) {
+    if (!out[expected]) {
+      throw new Error(
+        `Failed to extract catalogue "${expected}" from ${sourceFilePath} — ` +
+          `the script expected a top-level "export const ${expected} = [...] as const" declaration.`,
+      );
+    }
+  }
+
+  return out;
+}
+
+/**
+ * Walk `dir` recursively and yield every `.ts` file path
+ * (excluding declaration files and the dirs listed in
+ * SKIPPED_DIRS / SKIPPED_SUBPATHS).
+ */
+function* walkTsFiles(dir, rootForRelative) {
+  let entries;
+  try {
+    entries = readdirSync(dir);
+  } catch {
+    return;
+  }
+  for (const entry of entries) {
+    if (SKIPPED_DIRS.has(entry) || entry.startsWith('.')) continue;
+    const full = join(dir, entry);
+    const rel = relative(rootForRelative, full).replaceAll('\\', '/');
+    if (SKIPPED_SUBPATHS.some((skip) => rel === skip || rel.startsWith(skip + '/'))) {
+      continue;
+    }
+    let st;
+    try {
+      st = statSync(full);
+    } catch {
+      continue;
+    }
+    if (st.isDirectory()) {
+      yield* walkTsFiles(full, rootForRelative);
+    } else if (entry.endsWith('.ts') && !entry.endsWith('.d.ts')) {
+      yield full;
+    }
+  }
+}
+
+/**
+ * Find every catalogue-violation in a single source file.
+ * Returns an array of `{ file, line, column, callee, value,
+ * catalogue }` records. Exported for the spec.
+ */
+export function findViolationsInFile(filePath, catalogues, sourceText) {
+  const text = sourceText ?? readFileSync(filePath, 'utf8');
+  const sourceFile = ts.createSourceFile(filePath, text, ts.ScriptTarget.Latest, true);
+  const violations = [];
+
+  function visit(node) {
+    if (ts.isCallExpression(node) && ts.isIdentifier(node.expression)) {
+      const callee = node.expression.text;
+      const catalogueName = DECORATOR_TO_CATALOGUE[callee];
+      if (catalogueName) {
+        const valid = catalogues[catalogueName];
+        for (const arg of node.arguments) {
+          if (ts.isStringLiteral(arg) || ts.isNoSubstitutionTemplateLiteral(arg)) {
+            if (!valid.has(arg.text)) {
+              const { line, character } = sourceFile.getLineAndCharacterOfPosition(arg.getStart());
+              violations.push({
+                file: filePath,
+                line: line + 1,
+                column: character + 1,
+                callee,
+                value: arg.text,
+                catalogue: catalogueName,
+              });
+            }
+          }
+        }
+      }
+    }
+    ts.forEachChild(node, visit);
+  }
+
+  visit(sourceFile);
+  return violations;
+}
+
+/**
+ * Top-level scan: walk `apps/` and `libs/`, accumulate
+ * violations, return them all. Pure (no I/O outside the file
+ * reads it does itself). Exported for the spec.
+ */
+export function scanWorkspace(workspaceRoot = WORKSPACE_ROOT) {
+  const catalogues = extractCatalogues(
+    join(workspaceRoot, 'libs/shared/auth/src/lib/authorization.types.ts'),
+  );
+  const out = [];
+  for (const dirName of ['apps', 'libs']) {
+    const dir = join(workspaceRoot, dirName);
+    for (const file of walkTsFiles(dir, workspaceRoot)) {
+      out.push(...findViolationsInFile(file, catalogues));
+    }
+  }
+  return { violations: out, catalogues };
+}
+
+function main() {
+  const { violations, catalogues } = scanWorkspace();
+
+  if (violations.length === 0) {
+    const privCount = catalogues.PRIVILEGES.size;
+    const roleCount = catalogues.FUNCTIONAL_ROLES.size;
+    console.log(
+      `catalogue-drift: clean (catalogues: ${privCount} privileges, ${roleCount} roles).`,
+    );
+    process.exit(0);
+  }
+
+  console.error('catalogue-drift: violations found');
+  console.error('');
+  // Group by file for a readable report. Within a file, sort by
+  // line so the output mirrors the editor's view.
+  const byFile = new Map();
+  for (const v of violations) {
+    if (!byFile.has(v.file)) byFile.set(v.file, []);
+    byFile.get(v.file).push(v);
+  }
+  for (const [file, list] of byFile) {
+    list.sort((a, b) => a.line - b.line || a.column - b.column);
+    const rel = relative(WORKSPACE_ROOT, file).replaceAll('\\', '/');
+    console.error(`  ${rel}`);
+    for (const v of list) {
+      console.error(
+        `    ${v.line}:${v.column}  @${v.callee}('${v.value}') — not in ${v.catalogue}`,
+      );
+    }
+  }
+  console.error('');
+  console.error(
+    `Catalogues are closed in v1 per ADR-0025. To add a value, amend ` +
+      `the ADR and the corresponding constant in ` +
+      `libs/shared/auth/src/lib/authorization.types.ts.`,
+  );
+  process.exit(1);
+}
+
+// Only run main() when invoked as a CLI (not when imported by the
+// spec).
+const isMain =
+  import.meta.url === `file://${process.argv[1]}` ||
+  import.meta.url === `file://${resolve(process.argv[1])}`;
+if (isMain) {
+  main();
+}