## Summary
- remove tenant-based Graph options access from runtime service paths and enforce provider-only resolution
- add `MicrosoftGraphOptionsResolver` and `ProviderConfigurationRequiredException` for centralized, actionable provider-config errors
- turn `Tenant::graphOptions()` into a fail-fast kill switch to prevent legacy runtime usage
- add and update tests (including guardrail) to enforce no reintroduction in `app/`
- update Spec 088 artifacts (`spec`, `plan`, `research`, `tasks`, checklist)
## Validation
- `vendor/bin/sail bin pint --dirty`
- `vendor/bin/sail artisan test --compact --filter=NoLegacyTenantGraphOptions`
- `vendor/bin/sail artisan test --compact tests/Feature/Filament`
- `CI=1 vendor/bin/sail artisan test --compact`
## Notes
- Branch includes the guardrail test for legacy callsite detection in `app/`.
- Full suite currently green: 1227 passed, 5 skipped.
Co-authored-by: Ahmed Darrazi <ahmeddarrazi@MacBookPro.fritz.box>
Reviewed-on: #105
ahmido
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