feat: expose consistent_hashing policy in Python router CLI args (#17972)

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

@@ -246,7 +246,15 @@ class RouterArgs:
             f"--{prefix}policy",
             type=str,
             default=RouterArgs.policy,
-            choices=["random", "round_robin", "cache_aware", "power_of_two", "manual"],
+            choices=[
+                "random",
+                "round_robin",
+                "cache_aware",
+                "power_of_two",
+                "manual",
+                "consistent_hashing",
+                "prefix_hash",
+            ],
             help="Load balancing policy to use. In PD mode, this is used for both prefill and decode unless overridden",
         )
         routing_group.add_argument(
@@ -260,6 +268,8 @@ class RouterArgs:
                 "power_of_two",
                 "manual",
                 "bucket",
+                "consistent_hashing",
+                "prefix_hash",
             ],
             help="Specific policy for prefill nodes in PD mode. If not specified, uses the main policy",
         )
@@ -267,7 +277,15 @@ class RouterArgs:
             f"--{prefix}decode-policy",
             type=str,
             default=None,
-            choices=["random", "round_robin", "cache_aware", "power_of_two", "manual"],
+            choices=[
+                "random",
+                "round_robin",
+                "cache_aware",
+                "power_of_two",
+                "manual",
+                "consistent_hashing",
+                "prefix_hash",
+            ],
             help="Specific policy for decode nodes in PD mode. If not specified, uses the main policy",
         )
         routing_group.add_argument(