docs: add CHANGELOG.md (#37)

Agent-Logs-Url: https://github.com/SF-Zhou/lockmap/sessions/cbfd20c7-bc83-491c-8108-088c67eb3551

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: SF-Zhou <7477599+SF-Zhou@users.noreply.github.com>

Author: Copilot

CHANGELOG.md

@@ -0,0 +1,105 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [0.2.2] - 2026-04-27
+
+### Added
+
+- Add `max_evict` parameter to `try_evict` to limit the number of evictions per call (#35)
+
+## [0.2.1] - 2026-03-10
+
+### Fixed
+
+- Remove `Send` bound from `Entry`/`LruEntry` and relax `Sync` bounds for correctness (#34)
+
+### CI
+
+- Enhance CI workflow with multi-OS and multi-architecture build matrix (#32)
+- Upgrade `codecov-action` (#31)
+
+### Documentation
+
+- Add Crates.io download-count badge to README (#33)
+
+## [0.2.0] - 2026-03-05
+
+### Changed
+
+- **Breaking:** Consolidate workspace into a single crate; migrate to `parking_lot` mutex and `HashTable`-based `LockMap` with a unified `Entry` API (#30)
+
+### Added
+
+- Add `set_max_size` interface for LRU cache size control (#29)
+
+### Performance
+
+- Single-hash, single-probe optimizations for LRU cache using the entry API (#27)
+
+## [0.1.16] - 2025-12-30
+
+### Performance
+
+- Further optimize entry cleanup to reduce overhead (#25)
+
+## [0.1.15] - 2025-12-28
+
+### Fixed
+
+- Fix Miri violations and improve concurrency safety (#22)
+
+### Performance
+
+- Optimize entry cleanup (#24)
+
+### CI
+
+- Speed up CI pipeline (#19)
+
+### Documentation
+
+- Add FAQ section addressing Miri test failure scenarios (#21)
+
+## [0.1.14] - 2025-09-04
+
+### Fixed
+
+- Fix elided lifetime compilation warning (#15)
+
+### Documentation
+
+- Improve documentation comments throughout the project (#17)
+
+## [0.1.13] - 2025-08-01
+
+### Added
+
+- Support batch lock acquisition for multiple keys atomically (#14)
+
+## [0.1.12] - 2025-07-25
+
+### Added
+
+- Initial release of `lockmap` with a thread-safe, fine-grained per-key locking `HashMap`
+- Use `foldhash` as the default hasher for improved performance (#10)
+- Add benchmarks (#10)
+- Add MIT and Apache-2.0 dual-license headers (#9)
+- Configure trusted publishing via `crates.io` (#13)
+
+### Changed
+
+- Iterative interface optimizations across multiple releases (#3, #4, #6, #7)
+- Performance improvements to the core locking implementation (#5)
+
+[0.2.2]: https://github.com/SF-Zhou/lockmap/compare/v0.2.1...v0.2.2
+[0.2.1]: https://github.com/SF-Zhou/lockmap/compare/v0.2.0...v0.2.1
+[0.2.0]: https://github.com/SF-Zhou/lockmap/compare/v0.1.16...v0.2.0
+[0.1.16]: https://github.com/SF-Zhou/lockmap/compare/v0.1.15...v0.1.16
+[0.1.15]: https://github.com/SF-Zhou/lockmap/compare/v0.1.14...v0.1.15
+[0.1.14]: https://github.com/SF-Zhou/lockmap/compare/v0.1.13...v0.1.14
+[0.1.13]: https://github.com/SF-Zhou/lockmap/compare/v0.1.12...v0.1.13
+[0.1.12]: https://github.com/SF-Zhou/lockmap/releases/tag/v0.1.12