Fix Version Management and Release Process

Remove hardcoded version from composer.json and implement proper release management to prevent version drift.

Acceptance Criteria:

• Remove hardcoded version from composer.json
• Implement automated versioning using GitLab tags
• Create release workflow documentation
• Add CHANGELOG.md automation
• Implement semantic versioning strategy
• Document version management process

Related Files:

• composer.json
• CHANGELOG.md
• .gitlab-ci.yml