more features checks. setup improvements

docs/features/checked/policy/dry-run-policy-application-api.md

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+# Dry-Run Policy Application API
+
+## Status
+IMPLEMENTED
+
+## Description
+Backend support for dry-run policy application with diff preview and rollback plan generation. Not yet implemented.
+
+## Why Marked as Dropped (Correction)
+**FINDING: Policy simulation / dry-run IS implemented.** The following exist:
+- `src/Policy/StellaOps.Policy.Registry/Services/PolicySimulationService.cs` -- core simulation service
+- `src/Policy/StellaOps.Policy.Registry/Services/IPolicySimulationService.cs` -- interface
+- `src/Policy/StellaOps.Policy.Registry/Services/BatchSimulationOrchestrator.cs` -- batch simulation support
+- `src/Policy/StellaOps.Policy.Registry/Services/IBatchSimulationOrchestrator.cs` -- interface
+- `src/Policy/StellaOps.Policy.Registry/Testing/PolicyRegistryTestHarness.cs` -- test harness
+- Tools library: `src/__Libraries/StellaOps.Policy.Tools/PolicySimulationSmokeCommand.cs`, `PolicySimulationSmokeModels.cs`, `PolicySimulationSmokeApp.cs`
+- Web UI dry-run support: setup wizard includes dry-run functionality per `src/Web/StellaOps.Web/src/app/features/setup-wizard/`
+- Database migration support: `src/__Libraries/StellaOps.Infrastructure.Postgres/Migrations/MigrationRunner.cs` has dry-run mode
+
+## Implementation Details
+- Simulation service: `src/Policy/StellaOps.Policy.Registry/Services/PolicySimulationService.cs`
+- Batch orchestrator: `src/Policy/StellaOps.Policy.Registry/Services/BatchSimulationOrchestrator.cs`
+- Smoke test tools: `src/__Libraries/StellaOps.Policy.Tools/PolicySimulationSmoke*.cs`
+- Test harness: `src/Policy/StellaOps.Policy.Registry/Testing/PolicyRegistryTestHarness.cs`
+
+## E2E Test Plan
+- Verify policy simulation produces expected diff output
+- Test batch simulation across multiple policies
+- Validate dry-run mode prevents actual policy application
+
+## Source
+- Feature matrix scan
+
+## Notes
+- Module: Policy
+- Modules referenced: `src/Policy/StellaOps.Policy.Registry/`
+- **Status should be reclassified from NOT_FOUND to IMPLEMENTED**