Added info logs when graph is truncated

lightrag/kg/networkx_impl.py

@@ -287,6 +287,9 @@ class NetworkXStorage(BaseGraphStorage):
             # Check if graph is truncated
             if len(sorted_nodes) > max_nodes:
                 result.is_truncated = True
+                logger.info(
+                    f"Graph truncated: {len(sorted_nodes)} nodes found, limited to {max_nodes}"
+                )
 
             limited_nodes = [node for node, _ in sorted_nodes[:max_nodes]]
             # Create subgraph with the highest degree nodes
@@ -317,6 +320,9 @@ class NetworkXStorage(BaseGraphStorage):
             # and we've reached max_nodes, then the graph is truncated
             if queue and len(bfs_nodes) >= max_nodes:
                 result.is_truncated = True
+                logger.info(
+                    f"Graph truncated: breadth-first search limited to {max_nodes} nodes"
+                )
 
             # Create subgraph with BFS discovered nodes
             subgraph = graph.subgraph(bfs_nodes)