Improve jobs control plane and status API

[kraftaa]

Summary

• Add control-plane schema and CLI for scheduled sync jobs:
  • init-jobs, add-job, worker, force-job, reset-state
• Add status API and UI:
  • JSON + HTML views, status filter, auto-refresh
  • job actions in UI: force run, retry failed, reset state
  • endpoints: /jobs, /jobs/html, /jobs/summary, /logs, /health, /health/worker
• Record job runs with extra metadata:
  • severity, metrics_json, duration_ms
  • optional DQ hook via RUSTREAM_DQ_CMD
• Improve reliability and migration behavior:
  • schema backfill on startup for control DB columns
  • invalid saved watermark/cursor state is detected and reset
  • --reset-state / reset-state --table ... for explicit recovery
• Production template skeletons:
  • examples/production-template (docker-compose, Helm, Terraform stub)
  • GHCR Docker publish workflow

Testing

• cargo fmt -- --check
• cargo test
• cargo clippy --all-targets -- -D warnings
• Manual smoke:
  • init-jobs, add-job, worker, status-api
  • verified /jobs, /jobs/html, /logs, /health, /health/worker
  • verified UI actions (force/retry/reset)