Gate ES-backed contract tests

Mark the local Elasticsearch-backed API contract suite as integration and skip it unless NAMERES_RUN_INTEGRATION_TESTS=1 is set.

Author: shuchenliu

pyproject.toml

@@ -124,6 +124,7 @@ testpaths = ["test"]
 
 # Markers
 markers = [
+    "integration: marks tests that require external services",
     "unit",
     "performance"
 ]

test/test_api_contract.py

@@ -17,6 +17,15 @@
 
 
 ROOT = Path(__file__).resolve().parents[1]
+RUN_INTEGRATION_TESTS = os.getenv("NAMERES_RUN_INTEGRATION_TESTS") == "1"
+
+pytestmark = [
+    pytest.mark.integration,
+    pytest.mark.skipif(
+        not RUN_INTEGRATION_TESTS,
+        reason="set NAMERES_RUN_INTEGRATION_TESTS=1 to run local Elasticsearch-backed API contract tests",
+    ),
+]
 
 
 def _free_port() -> int: