fix(node): handle default core config and refresh cache before sync

- Update node query to include nodes with null core_config_id when filtering by core_id=1
- Add cache refresh before syncing node users to prevent stale core/inbound configuration races
- Ensures default core configuration is properly included in node queries
- Prevents race conditions between cache updates and user synchronization

Author: x0sina

app/db/crud/node.py

@@ -116,7 +116,10 @@ async def get_nodes(
         stmt = stmt.where(Node.status.not_in([NodeStatus.disabled, NodeStatus.limited]))
 
     if params.core_id:
-        stmt = stmt.where(Node.core_config_id == params.core_id)
+        if params.core_id == 1:
+            stmt = stmt.where(or_(Node.core_config_id == params.core_id, Node.core_config_id.is_(None)))
+        else:
+            stmt = stmt.where(Node.core_config_id == params.core_id)
 
     if params.ids:
         stmt = stmt.where(Node.id.in_(params.ids))

app/node/worker.py

@@ -202,6 +202,8 @@ async def _sync_node_users(self, data: dict):
         flush_users = data.get("flush_users", False)
         if not node_id:
             return
+        # Refresh from KV before syncing to avoid stale core/inbound cache races.
+        await core_manager._reload_from_cache()
         async with GetDB() as db:
             await self._node_operator.sync_node_users(db, node_id=node_id, flush_users=flush_users)