fix(dcy-011/bat-022): GET /v1/admin/daemons 목록 엔드포인트 추가 — UI 계약 누락(405) 해소 (라이브 통합테스트 결함)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VHtM5Ws1HKCKQ4JGi6GRb5

app/repositories/postgres.py

@@ -2289,6 +2289,19 @@ class PostgresPortfolioRepository:
             rows = cur.fetchall()
         return [self._row_to_daemon(row) for row in rows]
 
+    def list_daemons_all(self) -> list[Daemon]:
+        """Return all daemons across all owners (admin use only)."""
+        self.ensure_schema()
+        with self._connect().cursor() as cur:
+            cur.execute(
+                """
+                SELECT id, owner_user_id, daemon_slug, display_name, is_active, created_at, updated_at
+                FROM daemons ORDER BY created_at ASC
+                """,
+            )
+            rows = cur.fetchall()
+        return [self._row_to_daemon(row) for row in rows]
+
     def update_daemon(
         self,
         daemon_id: str,