chore: release v4.2.0

[sw-release-bot]

🤖 New release

• coordinode-lsm-tree: 4.1.0 -> 4.2.0

Changelog

4.2.0 - 2026-03-26

Added

• comparator-aware range tombstones (#180)
• (compression) CompressionProvider trait + pure Rust zstd backend (#176)
• (error) RouteMismatch error, blocked_bloom cleanup, bench/clippy fixes (#166)
• (config) per-level Fs routing for tiered storage (#163)

Performance

• (bench) consolidate benchmarks + nextest + flamegraph pipeline (#175)

Testing

• (table) add zstd dict helper coverage (#181)

---

This PR was generated with release-plz.

[coderabbitai]

Important

Review skipped

Bot user detected.

To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro

Run ID: adbe4b0a-3cb4-4012-9432-44ddd6dc5ef9

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch release-plz-2026-03-24T18-01-18Z

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[sw-release-bot]

⚠️ Performance Alert ⚠️

Possible performance regression was detected for benchmark 'lsm-tree db_bench'.
Benchmark result of this commit is worse than the previous benchmark result exceeding threshold 1.10.

Benchmark suite	Current: 3c32049	Previous: 1d04814	Ratio
fillrandom	726482.658149593 ops/sec (normalized)	801243.1510153636 ops/sec (normalized)	1.10
overwrite	664931.6984736642 ops/sec (normalized)	789356.8188063244 ops/sec (normalized)	1.19
readwhilewriting	289258.09269337845 ops/sec (normalized)	331406.43222883326 ops/sec (normalized)	1.15

This comment was automatically generated by workflow using github-action-benchmark.

CC: @polaz

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!