fix: attach additional data to node from image chunks

graphgen/operators/partition/partition_kg.py

@@ -66,3 +66,57 @@ async def partition_kg(
                 if image_data:
                     node_data["images"] = image_data
     return batches
+
+
+async def attach_additional_data_to_node(
+    batches: list[
+        tuple[
+            list[tuple[str, dict]], list[tuple[Any, Any, dict] | tuple[Any, Any, Any]]
+        ]
+    ],
+    chunk_storage: BaseKVStorage,
+) -> list[
+    tuple[list[tuple[str, dict]], list[tuple[Any, Any, dict] | tuple[Any, Any, Any]]]
+]:
+    """
+    Attach additional data from chunk_storage to nodes in the batches.
+    :param batches:
+    :param chunk_storage:
+    :return:
+    """
+    for batch in batches:
+        for node_id, node_data in batch[0]:
+            await _attach_by_type(node_id, node_data, chunk_storage)
+    return batches
+
+
+async def _attach_by_type(
+    node_id: str,
+    node_data: dict,
+    chunk_storage: BaseKVStorage,
+) -> None:
+    """
+    Attach additional data to the node based on its entity type.
+    """
+    entity_type = (node_data.get("entity_type") or "").lower()
+    if not entity_type:
+        return
+
+    source_ids = [
+        sid.strip()
+        for sid in node_data.get("source_id", "").split("<SEP>")
+        if sid.strip()
+    ]
+
+    # Handle images
+    if "image" in entity_type:
+        image_chunks = [
+            data
+            for sid in source_ids
+            if "image" in sid.lower() and (data := await chunk_storage.get_by_id(sid))
+        ]
+        if image_chunks:
+            # The generator expects a dictionary with an 'img_path' key, not a list of captions.
+            # We'll use the first image chunk found for this node.
+            node_data["images"] = image_chunks[0]
+            logger.debug("Attached image data to node %s", node_id)