Study https://github.com/langchain-ai/langchain/blob/master/libs/partners/qdrant/tests/integration_tests/test_vectorstores.py
and create standard integration tests for OceanbaseVectorStore by subclassing VectorStoreIntegrationTests.
Include a pytest fixture that creates an empty vector store connected to a test database.
Review OceanbaseVectorStore to determine which feature flags to enable (supports_mmr, supports_filter, etc.)

Read langchain_oceanbase/vectorstores.py and identify all capabilities that OceanbaseVectorStore supports.
Map these to the feature flag properties in VectorStoreIntegrationTests base class.

Run the integration tests against SeekDB and fix any failures:
docker-compose -f docker-compose.seekdb.yml up -d
pytest tests/integration_tests/test_vectorstore_standard.py -v