v12.0.0-beta.4

What's Changed

New Features 🎉

• perf(java): reduce fragment statistics allocations by @everySympathy in #8452
• feat: add mixed data file version capability by @Xuanwo in #8580

Bug Fixes 🐛

• fix(encoding): read wrapped miniblock level counts by @app/lance-gatefixer in #8410
• fix(fts): preserve global scoring for no-impact indexes by @BubbleCal in #8748
• fix(fts): canonicalize fuzzy expansion across segments by @BubbleCal in #8758
• fix(index): stream bulk index file copies by @jackye1995 in #8770
• fix(ci): stabilize test_scan_slice against page-cache state by @RupertMaiti2005 in #8815

Performance Improvements 🚀

• perf(fts): defer phrase confirmation with score bounds by @BubbleCal in #8749
• perf(fts): share MultiMatch prefilter materialization by @BubbleCal in #8750
• perf(fts): remove benchmark metrics from query hot paths by @BubbleCal in #8825

Other Changes

• refactor: replace hand-rolled string→bool parsing with str_is_truthy/str_to_bool by @app/copilot-swe-agent in #8675

Full Changelog: v12.0.0-beta.3...v12.0.0-beta.4