- Add cron-validation utility with Airflow presets support (@once, @daily, etc.)
- Validate cron expressions against customer scheduleLimit from DUC
- Fetch scheduleLimit via gRPC to ensure up-to-date configuration
- Improve ES updatePipeline to fetch current doc and merge changes
- Only update fields explicitly provided in PATCH request body
- Preserve config.tables when updating config.cron
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>