[router] Add gRPC E2E test suite (#11790)

sgl-router/py_test/e2e_grpc/conftest.py

@@ -0,0 +1,29 @@
+"""
+Pytest configuration for gRPC router e2e tests.
+
+This module provides shared fixtures that can be used across all gRPC router tests.
+"""
+
+import sys
+from pathlib import Path
+
+import pytest
+
+# Ensure router py_src is importable
+_ROUTER_ROOT = Path(__file__).resolve().parents[2]
+_ROUTER_SRC = _ROUTER_ROOT / "py_src"
+if str(_ROUTER_SRC) not in sys.path:
+    sys.path.insert(0, str(_ROUTER_SRC))
+
+# Ensure e2e_grpc test utilities are importable
+_E2E_GRPC_DIR = Path(__file__).parent
+if str(_E2E_GRPC_DIR) not in sys.path:
+    sys.path.insert(0, str(_E2E_GRPC_DIR))
+
+
+# Pytest markers for test organization
+def pytest_configure(config):
+    config.addinivalue_line("markers", "e2e: end-to-end tests with real workers")
+    config.addinivalue_line("markers", "grpc: gRPC-specific tests")
+    config.addinivalue_line("markers", "slow: slow-running tests")
+    config.addinivalue_line("markers", "pd: prefill-decode disaggregation tests")