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feat(kividb): add KiviDB backend - #884

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kividbio:feat/kividb-client
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zilliztech:mainfrom
kividbio:feat/kividb-client

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KiviDB is a multi-threaded, Redis-compatible store with RediSearch-style FT.* vector search built in. The client speaks RESP2 with raw FT.* commands, supports HNSW and FLAT indexes with L2/IP/cosine, and the NumGE and label-equality filters. optimize() waits until FT.INFO num_docs covers the corpus before searching.

Tests: unit tests for registration, metric mapping and TAG escaping; integration tests (skipped without a server) check recall >= 0.95 against brute force with no filter, an int filter and a label filter, and that every result satisfies its filter.

Claude-Session: https://claude.ai/code/session_01WdtvAfcNSzV85y5jAHMVr8

KiviDB is a multi-threaded, Redis-compatible store with RediSearch-style
FT.* vector search built in. The client speaks RESP2 with raw FT.*
commands, supports HNSW and FLAT indexes with L2/IP/cosine, and the
NumGE and label-equality filters. optimize() waits until FT.INFO
num_docs covers the corpus before searching.

Tests: unit tests for registration, metric mapping and TAG escaping;
integration tests (skipped without a server) check recall >= 0.95
against brute force with no filter, an int filter and a label filter,
and that every result satisfies its filter.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WdtvAfcNSzV85y5jAHMVr8
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[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: murtazayusuf
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@murtazayusuf

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/assign @XuanYang-cn

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3 participants