fix(node2): Use node_cache router_healthy for DAGI Router agents status

- Fix get_dagi_router_agents to use router_healthy from node_cache first
- Fallback to direct API call only if cache is unavailable
- This fixes NODE2 agents showing as 'stale' when router is actually healthy
- Fix CITY_SERVICE_URL in scripts (remove /api/city, use /api)

services/city-service/routes_city.py

@@ -4571,23 +4571,34 @@ async def get_dagi_router_agents(node_id: str):
     """
     import httpx
     
-    # Get router URL from database (node-specific)
-    endpoints = await repo_city.get_node_endpoints(node_id)
-    base_url = endpoints.get("router_url")
+    # First, try to get router health from node_cache (populated by node-guardian)
+    # This is preferred for remote nodes (like NODE2) where direct connection may not work
     router_healthy = False
+    try:
+        metrics = await repo_city.get_node_metrics(node_id)
+        if metrics and metrics.get("router_healthy") is not None:
+            router_healthy = metrics.get("router_healthy", False)
+            logger.debug(f"Using router_healthy from node_cache for {node_id}: {router_healthy}")
+    except Exception as e:
+        logger.debug(f"Failed to get cached router health for {node_id}: {e}")
     
-    # Check if router is healthy
-    if base_url:
-        try:
-            async with httpx.AsyncClient(timeout=3.0) as client:
-                resp = await client.get(f"{base_url}/health")
-            if resp.status_code == 200:
-                data = resp.json()
-                # Router can return "healthy" or "ok"
-                status = data.get("status", "").lower()
-                router_healthy = status in ("healthy", "ok")
-        except Exception as e:
-            logger.warning(f"Failed to check router health for {node_id} at {base_url}: {e}")
+    # Fallback: try direct health check (only works for local nodes like NODE1)
+    if router_healthy is False:
+        endpoints = await repo_city.get_node_endpoints(node_id)
+        base_url = endpoints.get("router_url")
+        
+        if base_url:
+            try:
+                async with httpx.AsyncClient(timeout=3.0) as client:
+                    resp = await client.get(f"{base_url}/health")
+                if resp.status_code == 200:
+                    data = resp.json()
+                    # Router can return "healthy" or "ok"
+                    status = data.get("status", "").lower()
+                    router_healthy = status in ("healthy", "ok")
+                    logger.debug(f"Direct router health check for {node_id}: {router_healthy}")
+            except Exception as e:
+                logger.debug(f"Failed to check router health for {node_id} at {base_url}: {e}")
     
     # Get agents from DB for this node
     try: