[model-gateway] Add PostgreSQL support to binding (#13766)

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Co-authored-by: Simo Lin <linsimo.mark@gmail.com>
Co-authored-by: Chang Su <chang.s.su@oracle.com>

sgl-router/bindings/python/sglang_router/router.py

@@ -210,6 +210,8 @@ class Router:
             "oracle_pool_min",
             "oracle_pool_max",
             "oracle_pool_timeout_secs",
+            "postgres_db_url",
+            "postgres_pool_max",
         ]
         for field in fields_to_remove:
             args_dict.pop(field, None)