refactor(gateway): remove quota schema compatibility

[iamjr15]

Summary

• delete QuotaTracker schema migration, retired-row pruning, and rebuild compatibility code
• initialize new quota objects directly with the exact current schema
• require every existing quota object and maintenance check to match the current schema exactly
• document the current-only QuotaTracker storage contract

Production reconciliation

• the sole active production user quota object was migrated by the preceding release
• /usage, quota peek/record, idempotency, and a live prompt all succeeded against the reconciled object
• this change intentionally fails closed for any non-current quota schema

Validation

• pnpm --filter @cheatcode/gateway-worker typecheck
• pnpm --filter @cheatcode/gateway-worker build
• pnpm knip
• pnpm lint
• pnpm typecheck
• pnpm build

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
cheatcode	Skipped		Jul 25, 2026 10:10am