feat: wire site-local repos, remove config DB from Site, update artifact service

- SiteExternalSystemRepository and SiteNotificationRepository registered in Site DI
- Removed AddConfigurationDatabase from Site role in Program.cs
- Removed ConfigurationDb from appsettings.Site.json
- ArtifactDeploymentService collects all 6 artifact types including data connections and SMTP

tests/ScadaLink.DeploymentManager.Tests/ArtifactDeploymentServiceTests.cs

@@ -16,12 +16,18 @@ public class ArtifactDeploymentServiceTests
 {
     private readonly ISiteRepository _siteRepo;
     private readonly IDeploymentManagerRepository _deploymentRepo;
+    private readonly ITemplateEngineRepository _templateRepo;
+    private readonly IExternalSystemRepository _externalSystemRepo;
+    private readonly INotificationRepository _notificationRepo;
     private readonly IAuditService _audit;
 
     public ArtifactDeploymentServiceTests()
     {
         _siteRepo = Substitute.For<ISiteRepository>();
         _deploymentRepo = Substitute.For<IDeploymentManagerRepository>();
+        _templateRepo = Substitute.For<ITemplateEngineRepository>();
+        _externalSystemRepo = Substitute.For<IExternalSystemRepository>();
+        _notificationRepo = Substitute.For<INotificationRepository>();
         _audit = Substitute.For<IAuditService>();
     }
 
@@ -72,7 +78,8 @@ public class ArtifactDeploymentServiceTests
             NullLogger<CommunicationService>.Instance);
 
         return new ArtifactDeploymentService(
-            _siteRepo, _deploymentRepo, comms, _audit,
+            _siteRepo, _deploymentRepo, _templateRepo, _externalSystemRepo, _notificationRepo,
+            comms, _audit,
             Options.Create(new DeploymentManagerOptions()),
             NullLogger<ArtifactDeploymentService>.Instance);
     }