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/postgres.py

@@ -5,7 +5,7 @@ from __future__ import annotations
 import hashlib
 import uuid
 from dataclasses import dataclass
-from datetime import datetime
+from datetime import datetime, timezone
 from typing import Any
 
 import psycopg
@@ -633,7 +633,7 @@ class PostgresPortfolioRepository:
         self.ensure_schema()
         with self._connect().cursor() as cur:
             cur.execute(
-                _SELECT_AUTH_TOKEN + "WHERE name = %s AND token_type = 'service'",
+                _SELECT_AUTH_TOKEN + "WHERE name = %s AND token_type = 'service' AND revoked_at IS NULL ORDER BY created_at DESC LIMIT 1",
                 (name,),
             )
             row = cur.fetchone()
@@ -1399,6 +1399,32 @@ class PostgresPortfolioRepository:
             row = cur.fetchone()
         return new_raw, self._row_to_auth_token(row)
 
+    def rebind_service_token(self, name: str, daemon_id: str) -> AuthToken:
+        self.ensure_schema()
+        with self._connect().cursor() as cur:
+            cur.execute(
+                _SELECT_AUTH_TOKEN + "WHERE name = %s AND token_type = 'service' AND revoked_at IS NULL ORDER BY created_at DESC LIMIT 1",
+                (name,),
+            )
+            existing_row = cur.fetchone()
+            if existing_row is None:
+                raise ValueError(f"서비스 토큰을 찾을 수 없습니다: {name}")
+            existing = self._row_to_auth_token(existing_row)
+
+            cur.execute(
+                """
+                UPDATE auth_tokens
+                SET daemon_id = %s
+                WHERE id = %s
+                RETURNING
+                    id, user_id, name, token_prefix, permission, token_type,
+                    expires_at, last_used_at, revoked_at, created_at, runtime_id, daemon_id
+                """,
+                (daemon_id, existing.id),
+            )
+            row = cur.fetchone()
+        return self._row_to_auth_token(row)
+
     @staticmethod
     def _row_to_daemon(row: Any) -> Daemon:
         if row is None: