[Misc] Redact ray runtime env before logging (#26302)

Signed-off-by: Rui Qiao <ruisearch42@gmail.com>

vllm/engine/arg_utils.py

@@ -1327,7 +1327,13 @@ class EngineArgs:
             import ray
 
             ray_runtime_env = ray.get_runtime_context().runtime_env
-            logger.info("Using ray runtime env: %s", ray_runtime_env)
+            # Avoid logging sensitive environment variables
+            sanitized_env = ray_runtime_env.to_dict() if ray_runtime_env else {}
+            if "env_vars" in sanitized_env:
+                sanitized_env["env_vars"] = {
+                    k: "***" for k in sanitized_env["env_vars"]
+                }
+            logger.info("Using ray runtime env (env vars redacted): %s", sanitized_env)
 
         # Get the current placement group if Ray is initialized and
         # we are in a Ray actor. If so, then the placement group will be