API - CODEX AGENTS: persistence and lifecycle endpoints

docs/ARCHITECTURE.md

@@ -133,30 +133,37 @@ agent_grant
   id
   agent_id
   workspace_slug
-  project_id
+  project_id (empty string internally means workspace-level grant)
   scopes[]
   mode: voluntary | reporting
   created_by_user_id
   created_at
+  updated_at
 
 pairing_code
   id
   agent_id
   code_hash
+  status: active | used | expired | revoked
   expires_at
-  consumed_at
+  created_at
+  used_at
 
 agent_audit_event
   id
   agent_id
-  owner_user_id
-  operation
-  workspace_slug
-  project_id
-  issue_id
-  idempotency_key
-  result
+  event_type
+  actor_user_id
+  metadata
   created_at
+
+idempotency_key
+  key
+  agent_id
+  request_hash
+  response_body
+  created_at
+  expires_at
 ```
 
 ## Actor model

docs/IMPLEMENTATION_PLAN.md

@@ -4,7 +4,7 @@ Last updated: 2026-05-14.
 
 ## Phase 0. Architecture baseline
 
-Status: current phase.
+Status: done in `97d98a7`.
 
 Deliverables:
 
@@ -23,6 +23,8 @@ Exit criteria:
 
 ## Phase 1. Agent Gateway skeleton
 
+Status: in progress. Initial service, migrations, persistence endpoints, token hashing, local Postgres compose, and smoke checks are implemented.
+
 Create standalone service with:
 
 - Dockerfile;