docs(adr): accept ADR-0026 + ADR-0027 (#219)

## Summary

Promotes [ADR-0026](docs/decisions/0026-person-user-portal-data-model.md) and [ADR-0027](docs/decisions/0027-portal-side-organisational-hierarchy.md) from `proposed` to `accepted`. Both shipped as `proposed` in #217 after the cascade / acteurs_plus source-of-truth audit reshaped the org-hierarchy model. No open questions left on either.

No code changes — same shape as #205 (ADR-0025 acceptance).

## What lands

| File | Change |
| --- | --- |
| `docs/decisions/0026-person-user-portal-data-model.md` | Frontmatter `status: proposed → accepted`. |
| `docs/decisions/0027-portal-side-organisational-hierarchy.md` | Frontmatter `status: proposed → accepted`. |
| `docs/decisions/README.md` | Rows for 0026 and 0027 flip to `accepted`. |
| `CLAUDE.md` | Roll-up bumped to `0001 → 0027 accepted`; two new Architecture bullets ("Portal-side identity model" and "Portal-side organisational hierarchy") added after the ADR-0025 bullet; ADR-0025's bullet adjusted to clarify the scope literal `etablissement:<structure-code>` (with a pointer to ADR-0027 for the `Structure.code` semantics); the `@RequireScope` Prisma-resolver roadmap entry now references both ADRs as accepted with the two-schema-then-resolver phasing. |

## Notes for the reviewer

- **ADR-0025's bullet got a small touch-up, not a rewrite.** The original copy listed scope kinds as `etablissement:<finess>`, which was accurate when ADR-0025 shipped but is now superseded by ADR-0027's `Structure.code` semantics (FINESS for medico-social rows, internal slugs otherwise). The change is `<finess>` → `<structure-code>` + a `see ADR-0027` parenthetical. No actual decision in ADR-0025 changes.
- **Two new Architecture bullets, mirrored on the ADR-0024 / ADR-0025 pair of bullets that precede them in tone + length.** The "Portal-side identity model" bullet calls out the `entraOid`-only v1 dedup and the non-unique `Person.email` (both decisions made during the split rework); the "Portal-side organisational hierarchy" bullet calls out the `Structure.code` round-trip semantics and the deferred-to-ADR-0028 items (`Pole`, `Service`, arbitrary nesting, per-source enrichment, full cascade sync).
- **No code changes**, so no `pnpm ci:check` impact. `pnpm exec prettier --check` clean on the four touched files.

## Test plan

- [x] `pnpm exec prettier --check` — clean on the four touched files.
- [x] Internal links resolve (ADR-0026 ↔ ADR-0027 mutual references, plus the `ADR-0028` dangling marker left intentional for the future sync ADR).
- [ ] **Review focus** — the two new Architecture bullets phrasing; the ADR-0025 bullet's small scope-literal touch-up; CLAUDE.md roll-up wording.

## What's next

Now unblocked — per ADR-0026 §"Phasing" and ADR-0027 §"Phasing":

1. **ADR-0027 Implementation PR 1** — `Region` / `Delegation` / `Structure` Prisma schema + inline reference-data migration (Région Nouvelle-Aquitaine + Délégation 33 + a handful of test-tenant structures) + `Structure.kind` catalogue + drift-gate extension. Independent of (2) at the schema level.
2. **ADR-0026 Implementation PR 1** — `Person` / `User` / `UserScope` Prisma schema + `PersonAndUserProvisioner` called from `SessionEstablisher` + `Person.source` catalogue + drift-gate extension + updated `PrincipalBuilder` populating `Principal.user.{id, personId}` from the real rows. Can ship in parallel with (1).
3. **ADR-0026 Implementation PR 2** — `PrismaScopeResolver` replacing `StubScopeResolver` + `/admin/users/:id/scopes` admin-app screen + `prisma/seed.ts` populating the 19 test personas' `user_scopes` per `notes/test-tenant-role-assignments.md`. Depends on both (1) and (2).
4. **ADR-0028 (proposed)** — Pléiades + Acteurs+ + cascade syncs + facet schemas (Salarié / Élu / Adhérent / Bénévole / Bénéficiaire / PartenaireExterne) + operator-confirmed Person-reconciliation flow + the deferred org-hierarchy extensions (`Pole`, `Service`, per-source enrichment).

---------

Co-authored-by: Julien Gautier <julien.gautier@apf.asso.fr>
Reviewed-on: #219

docs/decisions/0027-portal-side-organisational-hierarchy.md

@@ -1,5 +1,5 @@
 ---
-status: proposed
+status: accepted
 date: 2026-05-24
 decision-makers: R&D Lead
 tags: [data, backend]