v9.0.0-beta.18

What's Changed

New Features 🎉

• feat(io): publish object store metrics via the metrics crate by @wjones127 in #7533
• feat: support segment selection in pylance prewarm by @jackye1995 in #7677

Bug Fixes 🐛

• fix(python): fix tuple bug in _coerce_query_vector condition check by @hushengquan in #6555
• fix: map object_store::Error::NotFound to Error::NotFound instead of Error::IO by @LuciferYang in #6569
• fix: shift offsets after trimming values in merge_with_schema by @kaan-simbe in #6581
• fix: convert Arrow JSON to Lance JSON in single-fragment create path by @xloya in #7469
• fix: convert Arrow JSON when updating columns via merge/update path by @xloya in #7472
• fix(fsst): correct decoder output-buffer size contract to 8x by @LuciferYang in #7589
• fix(fts): enforce fuzzy max_expansions globally across index partitions by @BubbleCal in #7634
• fix: build list FTS indexes as row documents by @Xuanwo in #7656
• fix: solve hang in train_streaming_coreset_ivf_model by @cmccabe in #7676

Documentation 📚

• docs: add cleanup and auto cleanup documentation by @westonpace in #6546
• docs: add fragment sizing guidance to performance guide by @hamersaw in #6606
• docs(core): document spawn_cpu limitations and audit call sites by @wjones127 in #7643
• docs: update MemWAL format spec by @jackye1995 in #7655

Performance Improvements 🚀

• perf(arrow): zero-copy BFloat16Array::from(Vec) via Buffer::from_vec by @LuciferYang in #7614

Full Changelog: v9.0.0-beta.17...v9.0.0-beta.18