* feat(thermal): add thermal escalation seeded service
Cherry-picked from codex/thermal-escalation-phase1 and retargeted
to main. Includes thermal escalation seed script, RPC handler,
proto definitions, bootstrap/health/seed-health wiring, gateway
cache tier, client service, and tests.
* fix(thermal): wire data-loader, fix typing, recalculate summary
Wire fetchThermalEscalations into data-loader.ts with panel forwarding,
freshness tracking, and variant gating. Fix seed-health intervalMin from
90 to 180 to match 3h TTL. Replace 8 as-any casts with typed interface.
Recalculate summary counts after maxItems slice.
* fix(thermal): enforce maxItems on hydrated data + fix bootstrap keys
Codex P2: hydration branch now slices clusters to maxItems before
mapping, matching the RPC fallback behavior.
Also add thermalEscalation to bootstrap.js BOOTSTRAP_CACHE_KEYS and
SLOW_KEYS (was lost during conflict resolution).
* fix(thermal): recalculate summary on sliced hydrated clusters
When maxItems truncates the cluster array from bootstrap hydration,
the summary was still using the original full-set counts. Now
recalculates clusterCount, elevatedCount, spikeCount, etc. on the
sliced array, matching the handler's behavior.
