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* feat(vectordb): add OceanBase HNSW quantization (HNSW_SQ/HNSW_BQ) (#6348) Support OceanBase vector index quantization via VECTOR_VQ_LEVEL: - 32 (default): hnsw + inner_product - 8: hnsw_sq + inner_product (2-3x memory savings) - 1: hnsw_bq + cosine (~15x memory savings) HNSW_BQ requires cosine distance per OceanBase docs. Tested on OceanBase 4.3.5.5 (BP5). Closes #6202 * feat: add test inclusion for vectorDB tests in vitest configuration (#6358) * feat: add test inclusion for vectorDB tests in vitest configuration * refactor: update vectorDB README and setup for environment configuration - Enhanced README to clarify the use of factory pattern for vectorDB integration tests. - Updated instructions for setting up environment variables from a local file. - Removed obsolete PG integration test file and adjusted test execution instructions. - Improved structure explanation for shared test data and factory functions. * perf: integrationTest * feat: vector integration --------- Co-authored-by: ZHANG Yixin <hi.yixinz@gmail.com> Co-authored-by: Jingchao <alswlx@gmail.com>