Wraps the new /api/v1/coverages endpoints. Schema mirrors the cnHeat
mental model — antenna, frequency, height, azimuth, downtilt, radius
— with cnHeat-style imperial units (height_agl_ft, radius_mi,
frequency_ghz) the API converts to SI before validation.
Compute is asynchronous: 'terraform apply' returns once the prediction
is queued. The status / progress_pct / error_message / png_path /
raster_path / computed_at fields are computed and update on
'terraform refresh' as the worker progresses through queued →
computing → ready (or failed). Downstream resources that need a
ready heatmap can use a terraform_data trigger that polls the
status field.
Resource semantics:
- Create POST /api/v1/coverages (auto-queues compute)
- Read GET /api/v1/coverages/:id
- Update PATCH /api/v1/coverages/:id (does NOT auto-recompute)
- Delete DELETE /api/v1/coverages/:id
Update doesn't auto-recompute because parameter tweaks may not
require a fresh heatmap; operators can call the recompute endpoint
directly via the existing client method when they want fresh
outputs.
ImportState supported via the standard UUID passthrough.
