docs(audit): add report, google auth runbook, and agent repo map

docs/README.md

@@ -6,6 +6,7 @@ This documentation is written to be useful to both humans and AI agents. If you
 
 1. Architecture overview (agent-oriented)
    - `docs/architecture/AGENT_DIAGRAM.md`
+   - `docs/architecture/AGENT_REPO_MAP.md`
    - `docs/architecture/GATEWAY_SESSIONS_AND_QUEUE.md`
    - `docs/architecture/TYPESCRIPT_MAP.md`
    - `docs/architecture/SYMBOL_INDEX.md`
@@ -21,6 +22,7 @@ This documentation is written to be useful to both humans and AI agents. If you
    - `docs/performance/TUNING.md`
 6. Operations runbooks
    - `docs/operations/OPERATOR_PACK.md`
+   - `docs/operations/GOOGLE_AUTH.md`
 
 ## Quick Map (One Diagram)