small config bug fix

Signed-off-by: Lucas Liebenwein <11156568+lucaslie@users.noreply.github.com>

Author: lucaslie

tensorrt_llm/_torch/auto_deploy/utils/_config.py

@@ -190,6 +190,7 @@ def settings_customise_sources(
     ) -> tuple[PydanticBaseSettingsSource, ...]:
         """Customise settings sources."""
         deferred_yaml_settings = DynamicYamlWithDeepMergeSettingsSource(settings_cls)
+        env_settings.env_prefix = "AD_"  # NOTE: set prefix to avoid conflicts with other env vars
         return (
             init_settings,
             env_settings,