## Summary
- add the bounded workspace commercial lifecycle overlay from spec 251 on top of the existing entitlement substrate
- expose audited commercial state inspection and mutation on the system workspace detail surface
- gate onboarding activation and review-pack start actions through the shared lifecycle decision while preserving suspended read-only access to existing review, evidence, and generated-pack history
- add focused Pest coverage plus the spec/plan/tasks/data-model/contract artifacts for the feature
## Validation
- targeted Pest unit and feature lanes for lifecycle resolution, system-plane mutation, onboarding gating, review-pack enforcement, download preservation, customer review workspace access, and evidence snapshot access
- `cd apps/platform && ./vendor/bin/sail bin pint --dirty --format agent`
- integrated browser smoke on the system workspace detail and the preserved read-only review/evidence/review-pack surfaces
## Notes
- branch: `251-commercial-entitlements-billing-state`
- base: `dev`
- commit: `606e9760`
Co-authored-by: Ahmed Darrazi <ahmed.darrazi@live.de>
Reviewed-on: #292
