Add ChainClients (infra/chains.rs): per-chain data-source handles built once at
startup from config and shared via AppState. Each client is present only when
its chain feature flag is on, and a malformed chain endpoint now fails startup
(fail-closed) rather than the first request. Cloneable (grin's session state is
shared via Arc) so it lives in the cloneable AppState.
Foundation for the wallet-handlers phase — handlers will read these clients
from State. No endpoints yet (openapi unchanged).
- shared build_router() (lib) so main + tests exercise identical wiring
- tests/common: spins the real router + AppState against TEST_DATABASE_URL;
self-skips when unset (cargo test stays green without a DB). Deterministic,
non-secret test JWT/peppers; ephemeral generated identities only — no funded
or sensitive wallet seeds (those stay in a separate gitignored L3 harness).
- tests/db_queries: validates migrations + db layer against real Postgres
(peppered identity lookups, UNIQUE->409, session create/lookup/revoke,
key upsert/list/delete, restore-attempt counts).
- tests/auth_flow: HTTP flows through the real router (health, auth gate,
refresh rotation + old-token revocation, username set+lookup, key register+
fetch, NIP-05 directory).
- CI: new integration job with an ephemeral postgres:16 service.
- 82 tests total (69 unit + 13 integration), all green against live PG.
Complements the monorepo's client-side suite (it tests the wire format the
client sends; the client tests the wallet side); mirrors its secret-handling
(env-driven, gitignored). Mirrors the L0-L5 tiering from docs/engineering.
jwinterm