Added structured changelog documentation:
- Created releases/memory/ directory to track changes between tags
- Each version has a .md file (v1.2.1.md, etc.) documenting commits and impact
- Updated CLAUDE.md with release notes reference
- Updated README.md with releases section
- Updated .gitignore to track releases/memory/ while ignoring other release artifacts
This helps reviewers and developers understand changes between versions
before making new updates to the codebase.
Initial entry: v1.2.1.md documenting the pricelist refactor and
configurator component substitution fix.
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
