[model-gateway] add --disable-health-check option to skip worker health probes (#17002)

sgl-model-gateway/bindings/python/src/sglang_router/router_args.py

@@ -86,6 +86,7 @@ class RouterArgs:
     health_check_timeout_secs: int = 5
     health_check_interval_secs: int = 60
     health_check_endpoint: str = "/health"
+    disable_health_check: bool = False
     # Circuit breaker configuration
     cb_failure_threshold: int = 10
     cb_success_threshold: int = 3
@@ -599,6 +600,12 @@ class RouterArgs:
             default=RouterArgs.health_check_endpoint,
             help="Health check endpoint path",
         )
+        health_group.add_argument(
+            f"--{prefix}disable-health-check",
+            action="store_true",
+            default=RouterArgs.disable_health_check,
+            help="Disable all worker health checks at startup",
+        )
         # Tokenizer configuration
         tokenizer_group.add_argument(
             f"--{prefix}model-path",