[Bugfix] Restore BAGEL CFG KV transfers (#5620)

Signed-off-by: lishunyang12 <lishunyang03@gmail.com>
Co-authored-by: lishunyang12 <lishunyang03@gmail.com>

vllm_omni/distributed/omni_connectors/kv_transfer_manager.py

@@ -403,6 +403,7 @@ class OmniKVTransferManager:
         self._prefetch_executor: ThreadPoolExecutor | None = (
             ThreadPoolExecutor(max_workers=1, thread_name_prefix="kv-prefetch") if async_prefetch else None
         )
+
         self._prefetch_futures: dict[str, Any] = {}
         self._bg_copy_stream: current_omni_platform.Stream | None = None
 
@@ -415,6 +416,11 @@ class OmniKVTransferManager:
             except Exception as e:
                 logger.warning("Failed to eagerly initialize sender connector: %s", e)
 
+    @property
+    def tp_topology(self) -> KVTPTopology:
+        """Return the effective topology after config and runtime detection."""
+        return self._tp_topo
+
     @property
     def topo_config(self) -> _TransferTopoConfig:
         """Lazily build the parallel topology snapshot on first access."""