chore(rls): 新增 manual script gate 與 canary wave1

scripts/sync_dev_db.py

@@ -1,10 +1,15 @@
 #!/usr/bin/env python3
 """同步 dev DB — 補齊 prod 有但 dev 沒有的表"""
 import asyncio
+import os
+import sys
 from sqlalchemy.ext.asyncio import create_async_engine
 from sqlalchemy import text
 
-DEV_URL = "postgresql+asyncpg://awoooi:awoooi_prod_2026@192.168.0.188:5432/awoooi_dev"
+DEV_URL = os.environ.get("DEV_DATABASE_URL")
+if not DEV_URL:
+    print("ERROR: DEV_DATABASE_URL not set", file=sys.stderr)
+    sys.exit(1)
 
 MIGRATIONS = [
     ("auto_repair_executions", """