Spec 203: extract baseline compare strategy (#233)
## Summary
- extract baseline compare orchestration behind an explicit strategy contract and registry
- preserve the current Intune compare path through a dedicated `IntuneCompareStrategy`
- harden compare launch and review surfaces for mixed, unsupported, incomplete, and strategy-failure truth
- add Spec 203 artifacts, focused regression coverage, and future-domain strategy proof tests
## Testing
- `cd apps/platform && ./vendor/bin/sail artisan test --compact tests/Unit/Baselines/CompareStrategyRegistryTest.php tests/Unit/Baselines/CompareSubjectResultContractTest.php tests/Feature/Baselines/BaselineCompareStrategySelectionTest.php tests/Feature/Baselines/BaselineComparePreconditionsTest.php tests/Feature/Baselines/BaselineCompareExecutionGuardTest.php tests/Feature/Baselines/BaselineCompareMatrixCompareAllActionTest.php tests/Feature/Filament/BaselineProfileCompareStartSurfaceTest.php tests/Feature/Filament/BaselineCompareLandingStartSurfaceTest.php tests/Feature/Filament/BaselineCompareLandingWhyNoFindingsTest.php tests/Feature/Filament/BaselineCompareMatrixPageTest.php tests/Feature/Filament/OperationRunBaselineTruthSurfaceTest.php`
- `cd apps/platform && ./vendor/bin/sail bin pint --dirty --format agent`
## Notes
- no new Filament panel/provider registration changes
- no global-search resource changes
- no new asset registration or deployment step changes
Co-authored-by: Ahmed Darrazi <ahmed.darrazi@live.de>
Reviewed-on: #233
ahmido
d644265d30