chore: finish repo restructure cleanup

- Remove restructure-repo.sh (no longer needed)
- Fix sanity.yml service paths: services/ → src/services/
- portal/, services/, tools/ root dirs were untracked bin/obj artifacts (deleted locally)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: aurelianware

.github/workflows/sanity.yml

@@ -171,10 +171,10 @@ jobs:
 
           # Check .NET services
           dotnet_services=(
-            "services/enrollment-import-service/EnrollmentImportService.csproj"
-            "services/enrollment-import-service/Controllers/EnrollmentController.cs"
-            "services/enrollment-import-service/Services/EnrollmentImportService.cs"
-            "services/enrollment-import-service/Services/EnrollmentRepository.cs"
+            "src/services/enrollment-import-service/EnrollmentImportService.csproj"
+            "src/services/enrollment-import-service/Controllers/EnrollmentController.cs"
+            "src/services/enrollment-import-service/Services/EnrollmentImportService.cs"
+            "src/services/enrollment-import-service/Services/EnrollmentRepository.cs"
           )
 
           for file in "${dotnet_services[@]}"; do