feat(relay): Phase1 foundation — P3 Postgres store + async capability verifier + compose

RELAY-PHASE1 Wave A (2/3) + E1 infra:
- A1: createPgStores() Postgres adapter for all 9 P3 store ports + runMigrations();
  writable-CTE atomic INV8 status swaps; 0002_routes.sql. 23/23 pg tests, 96.72% cov.
- A3: real capability verifier delegating to relay-auth verifyCapabilityToken; sync->async
  seam across authz/provision/main. Full CP suite 15 files/101 pass, tsc clean.
- E1: deploy/docker-compose.yml (Postgres16+Redis7, loopback-only) + .env.example.
- docs: PLAN_RELAY_PHASE1.md file-level execution spec; PROGRESS_LOG RELAY-PHASE1 section.

control-plane/test/api-extra.test.ts

@@ -24,7 +24,7 @@ const env = loadEnv({
 })
 
 const verifier: CapabilityVerifier = {
-  verify(raw, expectedAud, now): CapabilityToken {
+  async verify(raw, expectedAud, now): Promise<CapabilityToken> {
     if (raw !== 'tokenA') throw new Error('invalid token')
     return { sub: ACCOUNT_A, aud: expectedAud, host: 'x', rights: ['manage'] as CapabilityRight[], iat: now, exp: now + 3600, jti: 'jti-A' }
   },