Fix missing imports after UME router split.

Restore sqlalchemy.func and runtime helpers so alarms_current upsert and pause/resume no longer raise NameError 500s.

Co-authored-by: Cursor <cursoragent@cursor.com>

netx_api/ume_inventory_router.py

@@ -6,7 +6,7 @@ from datetime import datetime, timezone
 from typing import Any
 
 from fastapi import APIRouter, Depends, HTTPException, Query
-from sqlalchemy import or_
+from sqlalchemy import func, or_
 from sqlalchemy.orm import Session
 
 from .config import settings