Julien Gautier 7a313f627c
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feat(portal-bff): redis client foundation per ADR-0010
First step toward Redis-backed sessions. Adds the shared `ioredis`
connection that every downstream consumer (session storage, OBO
token cache, …) will inject via the new `REDIS_CLIENT` DI token.

What lands:

- `ioredis@^5.10.1` as a direct dependency. Chosen by ADR-0010 for
  its mature Sentinel support — single-instance URL today,
  Sentinel-HA configuration plumbing lands with the production
  infrastructure ADR.
- `.env.example` promotes `REDIS_URL` from its previous future-vars
  comment block into an active variable, with a default that
  matches `infra/local/.env` (REDIS_PASSWORD + REDIS_PORT). The
  Sentinel-style keys (`REDIS_SENTINEL_HOSTS`,
  `REDIS_SENTINEL_NAME`, `REDIS_TLS`) stay in the future-vars
  comment until the prod deploy lands.
- `apps/portal-bff/src/config/check-redis-config.ts` — boot-time
  guard mirroring the existing four:
  `assertDatabaseUrl` / `assertEntraConfig` /
  `assertSessionSecret`. Refuses to start if `REDIS_URL` is unset,
  not a valid `redis://` / `rediss://` URL, missing the password
  (the local stack requires one), or still set to the
  `redis_dev_change_me` .env.example placeholder. Returns a typed
  `RedisConfig` with parsed `host` + `port` for downstream
  observability.
- `apps/portal-bff/src/redis/redis.token.ts` — `REDIS_CLIENT`
  string token + `Redis` type alias. Same shape as
  `ENTRA_CONFIG` / `MSAL_CLIENT`.
- `apps/portal-bff/src/redis/redis.module.ts` — `RedisModule`
  exposes a factory provider for `REDIS_CLIENT`. The factory
  builds the `ioredis` client from the parsed config, caps
  `maxRetriesPerRequest` at 3 (so an unreachable Redis surfaces a
  command-time error instead of an infinite reconnect storm), and
  wires `connect` / `ready` / `error` / `close` / `reconnecting`
  events into the Pino stream with the `redis` Pino context.
  Non-global on purpose — modules import it to state "I depend on
  Redis".
- `main.ts` calls `assertRedisConfig()` alongside the other three
  validators. `AppModule` imports `RedisModule`.

Verification:

- `nx run-many -t lint test build --projects=portal-bff` — green.
- 62 / 62 specs (was 52; +10 across the config validator spec and
  the module spec — the latter exercises both the happy path
  against an unreachable URL — `ioredis` constructs lazily so no
  real socket opens — and the missing-env failure mode).
- Boot smoke (with the local Compose stack running): the `redis`
  Pino context shows `redis.connect` → `redis.ready` lines on
  startup; killing the Redis container later produces
  `redis.close` / `redis.reconnecting`.

What this PR explicitly does NOT do:

- Mount `express-session` + `connect-redis` middleware. The next
  PR wires the session cookie (`__Host-portal_session`) + the
  encrypted payload + the lookup middleware that attaches `user` to
  every request.
- Plug the callback into session creation. Auth still ends with a
  Pino log + redirect; the SPA still sees the user anonymous on the
  next request.
2026-05-12 16:36:29 +02:00

Documentation index

This is the entry point to all project documentation. It is maintained automatically: any addition, rename, or removal of a .md file under docs/ must be reflected here in the same change.

Conventions

  • Documentation is written in English.
  • One topic per file. Group related files into a folder when there are three or more.
  • Cross-reference with relative links so they keep working in GitHub, IDEs, and exported sites.
  • For architectural decisions, do not add them here — they belong in decisions/ as MADR 4.0.0 ADRs.

Sections

Daily development

  • development.md — repo layout, prerequisites, initial setup, daily commands, observability dev-loop (Jaeger UI, log ↔ trace correlation), dependency updates (Renovate), conventional commit cycle. Day-to-day reference for working on the project.

Architecture

  • architecture.md — cross-cutting Mermaid diagrams: C4 system context, C4 containers, Nx module boundaries, CI/CD pipeline. Single-decision diagrams (auth sequence, ERD, etc.) live inline in their ADR.

Onboarding & environment

Setup guides for new contributors:

Operations & runbooks

Empty — to be populated when we deploy.

Security, performance, accessibility

Empty — placeholders to be filled with rationale docs alongside their corresponding ADRs.

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