Phase 2b: fires now scopes via the ArcGIS envelope from the coverage bbox
(dropping the single-state WHERE; event_id uses the fire's own POOState so
multi-state boxes work and Idaho dedup keys are unchanged); firms uses the
coverage bbox for its NASA query; ducting observes at the bbox centroid.
Coverage governs when set; each adapter's own config is the fallback.
Co-authored-by: Matt Johnson <mj@k7zvx.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
