- Add scripts/seed-forecasts.types.d.ts with ambient interfaces for all
simulation data structures (CandidatePacket, TheaterResult, SimulationOutcome,
ExpandedPath, SimulationEvidence, SimulationAdjustmentDetail)
- Add // @ts-check + @param JSDoc to contradictsPremise, negatesDisruption,
computeSimulationAdjustment, applySimulationMerge
- Add scripts/jsconfig.json to enable tsc --checkJs on seed-forecasts.mjs
- Remove dead legacy fallbacks candidatePacket?.topBucketId and
candidatePacket?.topChannel (these fields were never at top level in
production; the correct path is candidatePacket.marketContext.topBucketId).
TypeScript now enforces this at write time.
- Update all test fixtures to use marketContext: { topBucketId, topChannel }
shape, matching production CandidatePacket structure
