#9743 chore(contracts): sync the worker's steer disposition read contract

Summary

• Syncs the worker's read-only steer disposition contract (SteerDispositionRequest, SteerDispositionResponse) into apps/sim/lib/mothership/generated/protocol.ts with the worker's sync script.
• Additive only; nothing in Sim uses these yet. Sim's side of a paired contract merges first, per the mothership sim-companion process, so sim-sync can pass on the worker PR.

Companion: simstudioai/mothership#932

Type of Change

• Chore

Testing

The worker's sync-protocol.ts --check against this branch reports the copies in sync; biome; the pre-push type-check.

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing (new tests pass the test-audit authoring gate)
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)