[router] Introduce router integration tests (#10086)

sgl-router/py_test/run_suite.py

@@ -14,6 +14,13 @@ if __name__ == "__main__":
     args = arg_parser.parse_args()
 
     files = glob.glob("**/test_*.py", recursive=True)
+    # Exclude integration tests from the e2e suite; those are run separately via pytest -m integration
+    files = [
+        f
+        for f in files
+        if "/integration/" not in f and not f.startswith("integration/")
+    ]
+    files.sort()
 
     test_files = [TestFile(name=file) for file in files]
     exit_code = run_unittest_files(test_files, args.timeout_per_file)