chore: import upstream snapshot with attribution

tests/api/config/test_api_config_gemini.py

@@ -0,0 +1,12 @@
+import pytest
+
+from lightrag.api.config import get_default_host
+
+
+pytestmark = pytest.mark.offline
+
+
+def test_gemini_default_host_uses_sdk_default_endpoint(monkeypatch):
+    monkeypatch.delenv("LLM_BINDING_HOST", raising=False)
+
+    assert get_default_host("gemini") == "DEFAULT_GEMINI_ENDPOINT"