chore: default python hash seed to zero always for the engines (#5583)

Signed-off-by: PeaBrane <yanrpei@gmail.com>

components/src/dynamo/sglang/__main__.py

 #  SPDX-FileCopyrightText: Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 #  SPDX-License-Identifier: Apache-2.0
 
+import os
+
+if "PYTHONHASHSEED" not in os.environ:
+    os.environ["PYTHONHASHSEED"] = "0"
+
 from dynamo.sglang.main import main
 
 if __name__ == "__main__":

components/src/dynamo/trtllm/__main__.py

 # SPDX-FileCopyrightText: Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0
+
+import os
+
+if "PYTHONHASHSEED" not in os.environ:
+    os.environ["PYTHONHASHSEED"] = "0"
+
 from dynamo.trtllm.main import main
 
 if __name__ == "__main__":

components/src/dynamo/vllm/__main__.py

 # SPDX-FileCopyrightText: Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0
 
+import os
+
+if "PYTHONHASHSEED" not in os.environ:
+    os.environ["PYTHONHASHSEED"] = "0"
+
 from dynamo.vllm.main import main
 
 if __name__ == "__main__":

examples/deployments/router_standalone/worker.py

@@ -13,9 +13,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import os
+
+if "PYTHONHASHSEED" not in os.environ:
+    os.environ["PYTHONHASHSEED"] = "0"
 
 import logging
-import os
 import uuid
 from typing import AsyncGenerator, Optional
 

examples/deployments/router_standalone_trtllm/worker.py

@@ -3,6 +3,9 @@
 
 import os
 
+if "PYTHONHASHSEED" not in os.environ:
+    os.environ["PYTHONHASHSEED"] = "0"
+
 # Fix protobuf version conflict with etcd3
 os.environ.setdefault("PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION", "python")
 

examples/multimodal/components/worker.py

 # SPDX-FileCopyrightText: Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0
 
+import os
+
+if "PYTHONHASHSEED" not in os.environ:
+    os.environ["PYTHONHASHSEED"] = "0"
+
 import argparse
 import asyncio
 import copy
 import logging
-import os
 import signal
 import sys
 from typing import Tuple