publish: underway MET to ERDDAP

## Workflow
- **File**: `publish_met_to_erddap.qmd`
- **Source ingest**: `ingest_calcofi_met`
- **Portal**: ERDDAP

## Checklist
- [ ] MET data source identified
- [ ] `/publish-template met erddap` scaffolded
- [ ] ERDDAP attributes defined
- [ ] Validated and uploaded to GCS
- [ ] PR reviewed & merged

## Dependencies
- Depends on: MET data ingest (TBD)