- Added "jti": str(uuid.uuid4()) to the access token payload in services/auth.py
- Promoted Wave 0 xfail stub test_create_access_token_includes_jti_claim to PASS
- Added test_create_access_token_jti_is_unique_per_call uniqueness guard
- uuid module was already imported at module top — no new imports needed
- Add test_create_access_token_includes_jti_claim with xfail(strict=False)
- Asserts 'jti' key present in decoded payload, parseable as UUID
- Wave 1 (Plan 02) will add jti to create_access_token to promote this stub
- All 17 existing tests unaffected