Ensure DP worker has VllmConfig set

Signed-off-by: Ming Yang <minos.future@gmail.com>

Author: minosfuture

vllm/v1/engine/core.py

@@ -607,9 +607,14 @@ def __init__(
 
             self._init_data_parallel(vllm_config)
 
-            super().__init__(
-                vllm_config, executor_class, log_stats, executor_fail_callback
-            )
+            # Set vllm_config context before EngineCore initialization
+            # so that models can access the config during __init__
+            from vllm.config import set_current_vllm_config
+
+            with set_current_vllm_config(vllm_config):
+                super().__init__(
+                    vllm_config, executor_class, log_stats, executor_fail_callback
+                )
 
             # Background Threads and Queues for IO. These enable us to
             # overlap ZMQ socket IO with GPU since they release the GIL,