mark: Phase 3.1 GREEN - SQS JWT validation complete

- Gateway validates SQS requests against Authentik JWKS
- JWKS cached with 15min TTL, auto-refresh on key rotation
- Verifies claims: iss, aud, exp, nbf, permissions
- Returns 403 with error details on failure
- Integration tests: reject without JWT, accept with valid JWT
- All tests passing

Phase 3 progress: 1/3 (next: 3.2 MinIO load-test)

tasks/INDEX.md

@@ -78,7 +78,7 @@ JWT validation (Option B), except SQS (code unverified, gateway validates).
 
 | Task | Description |
 |---|---|
-| [3.1](3.1-auth-sqs-jwt-validation.md) | SQS: Gateway JWT validation vs Authentik JWKS |
+| [3.1](3.1-auth-sqs-jwt-validation.md) | ✅ SQS: Gateway JWT validation vs Authentik JWKS |
 | [3.2](3.2-auth-minio-jwt-validation.md) | MinIO: Load-test native JWT/OIDC validation |
 | [3.3](3.3-auth-temporal-jwt-validation.md) | Temporal: Configure JWT via jwtKeyProvider |
 
@@ -158,9 +158,9 @@ Updated 2026-08-27 (session 3) — Phase 8 complete, Phase 3 (auth) next.
 - 8.9 Memory extended resources
 - 8.10 Phase gate ✅
 
-**Phase 3 (Authentication):** 0/3 TODO
-- 3.1 SQS JWT validation
-- 3.2 MinIO JWT load-test
+**Phase 3 (Authentication):** 1/3 IN PROGRESS
+- 3.1 SQS JWT validation ✅
+- 3.2 MinIO JWT load-test (next)
 - 3.3 Temporal JWT configuration
 
 **New modules (80+ tests passing):**