feat: implement evidence domain foundation (#183)
## Summary
- add the Evidence Snapshot domain with immutable tenant-scoped snapshots, per-dimension items, queued generation, audit actions, badge mappings, and Filament list/detail surfaces
- add the workspace evidence overview, capability and policy wiring, Livewire update-path hardening, and review-pack integration through explicit evidence snapshot resolution
- add spec 153 artifacts, migrations, factories, and focused Pest coverage for evidence, review-pack reuse, authorization, action-surface regressions, and audit behavior
## Testing
- `vendor/bin/sail artisan test --compact --stop-on-failure`
- `CI=1 vendor/bin/sail artisan test --compact`
- `vendor/bin/sail bin pint --dirty --format agent`
## Notes
- branch: `153-evidence-domain-foundation`
- commit: `b7dfa279`
- spec: `specs/153-evidence-domain-foundation/`
Co-authored-by: Ahmed Darrazi <ahmed.darrazi@live.de>
Reviewed-on: #183