Completes the Phase-3 fire migration for the native adapter. env/fires.py now
emits canonical data (_kind/irwin_id/declared_at/acres/contained), native
fires bypass the received-delta gate and run the shared gating.fire.decide +
fire formatter (forward-only growth + containment + 8h cooldown + deferred
commit), and a native-only cold-start pre-pass silent-seeds old/known fires so
no backlog spam. Fixes growth/containment silence (MORA) and revives the
fires-table-backed reminders/digest. Reuses the existing decider — no dup.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
