[Bugfix] Fix swapped engine_ids in NIXL Llama 4 local attention path (#33795)

Signed-off-by: Yoray Zack <yorayz@nvidia.com>

vllm/distributed/kv_transfer/kv_connector/v1/nixl_connector.py

@@ -2323,15 +2323,15 @@ class NixlConnectorWorker:
 
                 # Get descs ids for the layer.
                 layer_local_desc_ids = self._get_block_descs_ids(
-                    dst_engine_id,
+                    self.engine_id,
                     layer_local_block_ids,
                     layer_idx,
+                    block_size_ratio=block_size_ratio,
                 )
                 layer_remote_desc_ids = self._get_block_descs_ids(
-                    self.engine_id,
+                    dst_engine_id,
                     layer_remote_block_ids,
                     layer_idx,
-                    block_size_ratio=block_size_ratio,
                 )
 
                 local_descs_list.append(layer_local_desc_ids)