feat: add `KatanaDbExtractor` for direct database sync#18

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feat/katana-db-extractor

Commits on Mar 4, 2026

Commits on Mar 6, 2026

Add benchmark example for KatanaDbExtractor throughput testing

kariy
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claude
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Add max_events_per_batch to KatanaDbExtractor to bound memory usage

kariy
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claude
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Fix benchmark infinite loop when extractor catches up with chain head

kariy
and
claude
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