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/routes_city.py

@@ -4087,17 +4087,14 @@ async def get_dagi_router_health(node_id: str):
     """
     Get DAGI Router health status for a node.
     Always returns 200 with status="down" if router is unavailable.
+    Uses node-specific router_url from node_cache.
     """
     import httpx
     import time
     
-    # Node-specific router URLs
-    NODE_ROUTER_URLS = {
-        "node-1-hetzner-gex44": "http://dagi-router:9102",
-        "node-2-macbook-m4max": "http://localhost:9102",  # Local router on NODE2
-    }
-    
-    base_url = NODE_ROUTER_URLS.get(node_id)
+    # Get router URL from database (node-specific)
+    endpoints = await repo_city.get_node_endpoints(node_id)
+    base_url = endpoints.get("router_url")
     
     if not base_url:
         return {
@@ -4125,9 +4122,12 @@ async def get_dagi_router_health(node_id: str):
             }
         
         data = resp.json()
+        # Router can return "healthy" or "ok"
+        status_val = data.get("status", "").lower()
+        is_healthy = status_val in ("healthy", "ok")
         return {
             "node_id": node_id,
-            "status": "up" if data.get("status") == "healthy" else "degraded",
+            "status": "up" if is_healthy else "degraded",
             "version": data.get("version"),
             "agent_count": data.get("agent_count", 0),
             "latency_ms": round(latency_ms, 2)
@@ -4149,15 +4149,13 @@ async def get_dagi_router_agents(node_id: str):
     Get list of agents for a node.
     Since DAGI Router doesn't expose /agents endpoint, we use DB agents
     and check router health to determine status.
+    Uses node-specific router_url from node_cache.
     """
     import httpx
     
-    NODE_ROUTER_URLS = {
-        "node-1-hetzner-gex44": "http://dagi-router:9102",
-        "node-2-macbook-m4max": "http://localhost:9102",
-    }
-    
-    base_url = NODE_ROUTER_URLS.get(node_id)
+    # Get router URL from database (node-specific)
+    endpoints = await repo_city.get_node_endpoints(node_id)
+    base_url = endpoints.get("router_url")
     router_healthy = False
     
     # Check if router is healthy
@@ -4167,9 +4165,11 @@ async def get_dagi_router_agents(node_id: str):
                 resp = await client.get(f"{base_url}/health")
             if resp.status_code == 200:
                 data = resp.json()
-                router_healthy = data.get("status") == "healthy"
+                # 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}: {e}")
+            logger.warning(f"Failed to check router health for {node_id} at {base_url}: {e}")
     
     # Get agents from DB for this node
     try: