Add CHANGELOG.md to track project changes

Author: cj-taylor

CHANGELOG.md

@@ -0,0 +1,66 @@
+# 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/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+### Added
+- CHANGELOG.md file to track project changes
+
+## [0.1.4] - 2026-01-19
+
+### Changed
+- Replaced third-party release action with official gh CLI for more reliable release management
+
+### Fixed
+- Release workflow artifact naming to prevent file overwrites
+
+## [0.1.3] - 2026-01-19
+
+### Added
+- macOS Gatekeeper bypass instructions in release notes
+
+### Changed
+- Added explicit permissions to CI workflows (contents: read)
+
+## [0.1.2] - 2026-01-19
+
+### Fixed
+- Release workflow asset preparation to preserve unique artifact names
+
+## [0.1.1] - 2026-01-19
+
+### Added
+- GitHub Actions workflows for CI, PR checks, and automated releases
+- Dependabot configuration for weekly dependency updates
+- Issue templates for bug reports and feature requests
+- Pull request template
+- Security policy
+- Stale bot for inactive issues and PRs
+- Multi-platform release binaries (Linux, macOS Intel/ARM, Windows)
+
+### Changed
+- Enabled vendored OpenSSL for cross-compilation support
+
+### Fixed
+- Incomplete HTML sanitization in JavaScript (XSS vulnerabilities)
+- Code formatting issues
+- Clippy warning for manual range contains
+
+## [0.1.0] - 2026-01-15
+
+### Added
+- Initial release
+- OpenClass API integration for syncing student progress
+- SQLite database for local storage
+- REST API server
+- Interactive dashboard with analytics
+- Multi-class support with incremental sync
+- Student risk level identification
+- Assignment difficulty ranking
+- Engagement gap detection
+- Progress tracking over time
+- Night filtering for cohort comparison