feat: full node isolation - use node-specific swapper_url and router_url from DB

- Add migration 041_node_local_endpoints.sql
- Add get_node_endpoints() to repo_city.py
- Update routes_city.py to use DB endpoints instead of hardcoded URLs
- Update node-guardian-loop.py to use NODE_SWAPPER_URL/NODE_ROUTER_URL env vars
- Update launchd plist for NODE2 with router URL

services/city-service/repo_city.py

@@ -3287,6 +3287,8 @@ async def get_node_metrics_current(node_id: str) -> Optional[Dict[str, Any]]:
             COALESCE(swapper_healthy, false) as swapper_healthy,
             COALESCE(swapper_models_loaded, 0) as swapper_models_loaded,
             COALESCE(swapper_models_total, 0) as swapper_models_total,
+            router_url,
+            swapper_url,
             updated_at
         FROM node_cache
         WHERE node_id = $1
@@ -3341,6 +3343,34 @@ async def get_node_metrics_current(node_id: str) -> Optional[Dict[str, Any]]:
     return result
 
 
+async def get_node_endpoints(node_id: str) -> Dict[str, str]:
+    """
+    Отримати URL endpoints для конкретної ноди.
+    Якщо в БД немає значень — підставляє дефолти для NODE1.
+    """
+    pool = await get_pool()
+    
+    row = await pool.fetchrow("""
+        SELECT router_url, swapper_url
+        FROM node_cache
+        WHERE node_id = $1
+    """, node_id)
+    
+    # Default values (NODE1 Docker-based)
+    defaults = {
+        "router_url": "http://dagi-router:9102",
+        "swapper_url": "http://swapper-service:8890"
+    }
+    
+    if not row:
+        return defaults
+    
+    return {
+        "router_url": row["router_url"] or defaults["router_url"],
+        "swapper_url": row["swapper_url"] or defaults["swapper_url"]
+    }
+
+
 async def get_node_metrics(node_id: str) -> Optional[Dict[str, Any]]:
     """
     Отримати розширені метрики ноди (включаючи Swapper).
@@ -3353,7 +3383,9 @@ async def get_node_metrics(node_id: str) -> Optional[Dict[str, Any]]:
             swapper_healthy,
             swapper_models_loaded,
             swapper_models_total,
-            swapper_state
+            swapper_state,
+            router_url,
+            swapper_url
         FROM node_cache
         WHERE node_id = $1
     """, node_id)