feat: extend daemon model with daemon status tracking and list support

- Add daemon status tracking with state and metrics (idle, running, error)
- Implement pfhub daemon list CLI command for viewing registered daemons
- Extend auth schema and service for daemon lifecycle management
- Add postgres repository queries for daemon state persistence
- Expand test coverage for daemon registry and status transitions
- Update rel-006 release document with daemon model verification results
- Support daemon graceful shutdown and error recovery patterns

app/repositories/portfolio_repository.py

@@ -73,6 +73,8 @@ class PortfolioRepository(Protocol):
 
     def rotate_service_token(self, name: str) -> tuple[str, AuthToken]: ...
 
+    def rebind_service_token(self, name: str, daemon_id: str) -> AuthToken: ...
+
     def create_daemon(
         self,
         owner_user_id: str,