Experiment: Add comprehensive CONTRIBUTING.md with CLI, Helm deployment, and S3 verification instructions#2

Copilot wants to merge 3 commits intomaincalypr/backup-service:mainfrom

copilot/fix-c57c6bf4-346f-41c3-9fba-3cb5eec68443calypr/backup-service:copilot/fix-c57c6bf4-346f-41c3-9fba-3cb5eec68443Copy head branch name to clipboard