feat(infra): dockerised full-stack dev mode — apps compose profile (ADR-0030)

Add an 'apps' Compose profile that runs the three Nx dev servers
(portal-bff, portal-shell, portal-admin) from a shared Dockerfile.dev,
so the whole stack boots with 'dev.sh up apps' and no native Node/pnpm.

- Dockerfile.dev: node:24-bookworm + corepack (pnpm from packageManager
  at runtime), NX_DAEMON=false. No build-time COPY/install.
- dev-entrypoint.sh: BFF runs prisma generate + migrate deploy then
  serves; SPA services go straight to nx serve.
- dev.compose.yml: one-shot apps-deps installs into a shared
  node_modules volume once (apps gate on its completion, no install
  race); repo bind-mounted, node_modules + .nx in named volumes; BFF
  reuses its own .env (required:false) with host URLs overridden to
  Compose service names.
- dev.sh: apps added to ALL_PROFILES + usage.
- Docs: which-mode-when table (setup doc), apps section (infra README),
  CLAUDE.md roll-up. ADR-0030 flipped to accepted.

Dev-only; production images stay with the ADR-0028 Container Registry
work. Additive + profile-gated — native and devcontainer flows
unchanged. Full-boot validation pending on a Docker host (see PR body).

infra/local/Dockerfile.dev

@@ -0,0 +1,35 @@
+# Dev-only image for the dockerised full-stack dev mode (ADR-0030).
+#
+# One image serves all three Nx apps (portal-bff / portal-shell /
+# portal-admin) — the monorepo means a single install. The image is
+# intentionally minimal: Node + corepack, nothing copied in. The repo
+# is bind-mounted at runtime and dependencies install into a named
+# volume (see dev.compose.yml `apps` profile), so node_modules — with
+# its native modules built for THIS image — is never shadowed by the
+# host's.
+#
+# NOT a production image. Production artefacts are out of scope per
+# ADR-0030 and tracked against the ADR-0028 Container Registry work.
+FROM node:24-bookworm
+
+# corepack ships with Node 24. Enabling it lets pnpm resolve from the
+# `packageManager` field in package.json at runtime — no version pinned
+# here, so this image never drifts from the repo's pinned pnpm.
+RUN corepack enable
+
+# Nx + Angular CLI memory ceiling — matches the devcontainer (.devcontainer/
+# devcontainer.json). 4 GB avoids OOM on large `nx` graph work.
+ENV NODE_OPTIONS=--max-old-space-size=4096
+# Nx daemon is per-container and would contend across the three app
+# containers sharing one workspace bind-mount — disable it. Slight
+# task-graph cost, robust behaviour.
+ENV NX_DAEMON=false
+
+WORKDIR /workspace
+
+# No COPY / no install at build time: the repo is bind-mounted and the
+# `apps-deps` one-shot service installs into the node_modules volume on
+# first boot. Build context stays tiny (just infra/local/) — nothing is
+# copied. Invoked via `bash` so it does not depend on the bind-mounted
+# script keeping its executable bit.
+ENTRYPOINT ["bash", "/workspace/infra/local/dev-entrypoint.sh"]