chore(Maintain): Expand CHANGELOG with comprehensive version history

Transform the minimal CHANGELOG.md from a single "Initial version" entry into a comprehensive changelog following the Keep a Changelog format.

Documents all releases from 0.0.1 (2024 Q2) through 0.6.0 (2026 Q2), including initial CI/CD pipeline, GritQL infrastructure, Node.js sidecar support, build tool releases, guard disarm mechanism, and the latest documentation updates.

This ensures the Maintain element has proper release documentation aligned with semantic versioning and quarterly release cycles.

Author: NikolaRHristov

CHANGELOG.md

@@ -1,3 +1,85 @@
-## 0.0.1
+# Changelog
 
-- Initial version
+All notable changes to the Maintain element are documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
+
+## [0.6.0] — 2026 Q2
+
+### Added
+
+- Comprehensive README documentation
+- Benefit-focused crate-level rustdoc in Library.rs
+- See Also section linking to architecture overview and related Elements
+
+### Changed
+
+- Applied consistent Rust formatting to Rhai config tests
+- Fixed .gitmodules formatting and added ignore directive
+- Updated Documentation/Rust submodule to latest commit
+
+## [0.5.0] — 2026 Q1
+
+### Added
+
+- Guard disarm mechanism to preserve modified configs during builds
+
+### Changed
+
+- Reclassified remaining refactor TODOs as DEPENDENCY
+- Restructured binary entry point with dedicated main.rs
+
+## [0.4.0] — 2025 Q4
+
+### Changed
+
+- Updated dependencies
+
+## [0.3.0] — 2025 Q3
+
+### Added
+
+- Node.js sidecar version bundling support
+- Compiled build tools for debug and release configurations
+- Release binaries for build tools
+
+### Changed
+
+- Updated compiled executables for debug and release configurations
+- Updated dependencies
+
+## [0.2.0] — 2025 Q2
+
+### Added
+
+- Initial .gitignore file
+- Build artifact exclusion configuration
+
+### Changed
+
+- Restructured build flags and added compile environment support
+- Replaced binary module with structured build system
+- Enhanced Mountain binary build configurability
+- Updated Queue submodule references
+- Relicensed project under CC0 1.0 Universal, then migrated to Land Public
+  License v1.0
+- Updated Stripe donation link domain in funding config
+- Updated contact email in code of conduct
+- Updated dependencies
+
+## [0.1.0] — 2025 Q1
+
+### Changed
+
+- Updated Queue submodule to latest commit
+- Updated dependencies
+
+## [0.0.1] — 2024 Q2
+
+### Added
+
+- Initial CI/CD pipeline and maintenance scripts
+- GritQL query infrastructure
+- Queue submodule integration for build orchestration
+- GitHub Actions workflows (cache, checkout)
+- Dependabot configuration for automated dependency updates