chore(release): bump version to 0.3.0

[pilotspacex-byte]

Release prep for v0.3.0

Bumps the crate version 0.2.0 → 0.3.0 and rolls [Unreleased] into [0.3.0] — 2026-06-11.

Release headlines (since v0.2.0, 50 commits)

• Background FT compaction + segment merge (PR feat(vector): background FT compaction + segment merge (prototype) #165) — HNSW builds off the event loop; 24.9s shard freeze → ~4.4ms, PING stays flat
• SQ8 quantization works across the full FT lifecycle (PR feat(vector): implement SQ8 quantization across the full FT segment lifecycle #166) — recall 0.014 → 0.897 on real MiniLM 384d; transactional-append stride fix; unit-sphere IP metric
• Hot-path perf pass (PR perf: deep-review hot-path optimizations (storage, WAL, SPSC, protocol, vector, io_uring) #168) — +33% pipelined SET, +25% pipelined GET (single shard); 11 verified findings
• HOTKEYS command + per-shard SpaceSaving sketch (PR feat: HOTKEYS hot-key detection + OBJECT over-the-wire fixes #169) — 1-in-64 sampling, hot path never blocks
• Elastic per-shard memory budgets (PR feat(shard): elastic per-shard memory budgets (hot-shard headroom borrowing) #170) — hot shards borrow idle siblings' headroom; 3.9× usable memory under skew
• OBJECT wire-reachability fix — was ERR unknown command on live servers (monoio read path)
• Cypher lexer migrated to logos 0.16; dependency bumps (tokio 1.52, rustls-webpki 0.103.13, roaring 0.11.4)

Pre-release gates

• Security review of full v0.2.0..main diff: no blocking issues (1 medium latent/unreachable code_len note in compaction.rs:554, tracked as follow-up)
• Perf/correctness review of full diff: no blocking issues (buffer reuse, atomic ordering, SQ8 math, segment-install handoff all verified)
• Local CI parity on Linux VM: fmt + clippy (default & tokio/jemalloc) green; test suites in flight
• GitHub CI green on main head c88ad02 (CodeQL failure there is a SARIF-upload token flake, analysis itself passed)

After merge: tag v0.3.0 on the merge commit → release.yml builds/signs/publishes all artifacts.

Summary by CodeRabbit

• New Features

  • Hot-shard elasticity enabling dynamic cluster scaling
  • Enhanced vector engine with background HNSW compaction, SQ8 quantization support, per-shard memory budgeting, and hotkey detection
  • Pipelined SET/GET operation performance improvements

• Bug Fixes

  • Various behavioral refinements and bug fixes

[qodo-code-review]

Qodo reviews are paused for this user.

Troubleshooting steps vary by plan Learn more →

On a Teams plan?
Reviews resume once this user has a paid seat and their Git account is linked in Qodo.
Link Git account →

Using GitHub Enterprise Server, GitLab Self-Managed, or Bitbucket Data Center?
These require an Enterprise plan - Contact us
Contact us →

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 93986fb2-a4f0-4555-94e3-21d6bb650ffa

📥 Commits

Reviewing files that changed from the base of the PR and between c88ad02 and c72c586.

⛔ Files ignored due to path filters (1)

• Cargo.lock is excluded by !**/*.lock

📒 Files selected for processing (2)

• CHANGELOG.md
• Cargo.toml

---

📝 Walkthrough

Walkthrough

This PR marks the 0.3.0 release by updating the package manifest version from 0.2.0 to 0.3.0 in Cargo.toml and adding a corresponding changelog entry documenting the release date and highlights including hot-shard elasticity, vector engine improvements, and performance optimizations.

Changes

0.3.0 Release

Layer / File(s)	Summary
Release version and changelog Cargo.toml, CHANGELOG.md	Package version is bumped to 0.3.0 and a new release entry is added to the changelog documenting hot-shard elasticity, vector engine maturity (HNSW compaction, SQ8 quantization, per-shard memory budgeting, hotkey detection), and pipelined SET/GET performance improvements.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• pilotspace/moon#155: Related version bump and release documentation work in Cargo.toml and CHANGELOG.md.

Poem

🐰 A hop, a bump, a changelog's verse,
From 0.2 to 0.3, for better or worse!
Hot shards dance, vectors now gleam,
Our little release, the coder's dream. 🚀

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description deviates significantly from the required template, providing release headlines and pre-release gates instead of the mandated sections (Summary, Checklist, Performance Impact, Notes).	Restructure the description to match the template: add a brief Summary section, complete the Checklist with CI results, note Performance Impact findings, and move release details to Notes.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the main change: bumping the version from 0.2.0 to 0.3.0, which is the core purpose of this release PR.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch release/v0.3.0

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

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