GitLab Support & CLI Integration

What's New

GitLab CI/CD Support

• Full support for GitLab CI/CD pipelines alongside GitHub Actions
• GitLab Flow Registry Client support (GL_REGISTRY_TOKEN)
• Auto-detection of CI platform

CLI-First Architecture

• All operations use the nipyapi CLI from main client library
• Requires nipyapi[cli]>=1.2.0
• Tested against NiFi 2.7.2

New Commands

• purge-flowfiles - Purge queued FlowFiles
• export-flow-definition / import-flow-definition - JSON/YAML export/import
• list-registry-flows, get-versions, get-diff - Discovery operations

See CHANGELOG.md for full details.