Binary Quantization Support for pgvector HNSW Algorithm

[Sheharyar570]

This update introduces binary vector quantization support to the pgvector HNSW algorithm within our benchmarking tool. The implementation includes binary vector quantization queries with an option for reranking.

New CLI and UI Options

• reranking (boolean): Enables or disables reranking for quantized queries.
• quantized_fetch_limit (integer): Specifies the number of rows to fetch for distance calculations between binary vectors before reranking.
• reranking_metric (string): Chooses the distance metric for reranking, with options:
  • COSINE
  • L2
  • IP

[Sheharyar570]

/assign @XuanYang-cn

[greenhal]

This is a great addition to VectorDBBench. My only suggestion is would be to try to reduce the large section of duplicate code in pgvector with the filtered/unfiltered sql query definition. Lines 132-194 & 195-245, this code is identical except for the where clause.

[Sheharyar570]

@greenhal I've refactored the code as you suggested and removed code duplication.

[sre-ci-robot]

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This pull-request has been approved by: alwayslove2013, Sheharyar570
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