Release v0.2.4

Release v0.2.3

Release v0.2.2

Release v0.2.1

Release v0.2.0

chore: Update dependencies for security patches

- Fix aws-lc-sys vulnerabilities (0.38.0 → 0.39.1)
- Fix rustls-webpki CRL issue (0.103.9 → 0.103.10)
- Update clap, hyper, and other dependencies
- Bump version to 0.1.1

Fix critical issues, add comprehensive README, prepare for v0.1.0 rel…

…ease

Fixes:
- Fix orchestrator auto-rollback on pipeline failure
- Fix K8s rollback to actually rollback (not just log)
- Use config.kubernetes.image_field instead of hardcoded container[0]
- Fix VersionBumpStep rollback to restore file (not stage it)
- Add duplicate tag check before creation
- Fix unsafe unwrap() calls in docker/aws integrations
- Fix AWS to return error instead of empty string
- Add comprehensive config validation (12 new checks)
- Fix unsafe changelog split handling
- Implement release --output json flag

New features:
- GitRepo.tag_exists() / checkout_file() / delete_tag()
- K8sClient.resolve_container_name() supports name or index
- Comprehensive 750-line README with full documentation

Housekeeping:
- Add LICENSE file (MIT)
- Update Cargo.toml metadata for crates.io
- Fix clippy warnings