[model-gateway]: move unit tests to bindings/python/tests/ (#16430)

sgl-model-gateway/bindings/python/tests/conftest.py

@@ -0,0 +1,14 @@
+"""
+Pytest configuration for sglang_router Python binding tests.
+
+These are unit tests that run without GPU resources or external dependencies.
+"""
+
+import pytest
+
+
+def pytest_configure(config):
+    """Configure pytest markers."""
+    config.addinivalue_line(
+        "markers", "unit: mark test as a unit test (no GPU required)"
+    )