Allow related chunks missing in knowledge graph queries

docs/DockerDeployment.md

@@ -119,4 +119,3 @@ Before building multi-architecture images, ensure you have:
 - Docker 20.10+ with Buildx support
 - Sufficient disk space (20GB+ recommended for offline image)
 - Registry access credentials (if pushing images)
-

lightrag/operate.py

@@ -3332,7 +3332,11 @@ async def _build_query_context(
         query_embedding=search_result["query_embedding"],
     )
 
-    if not merged_chunks:
+    if (
+        not merged_chunks
+        and not truncation_result["entities_context"]
+        and not truncation_result["relations_context"]
+    ):
         return None
 
     # Stage 4: Build final LLM context with dynamic token processing