Fix auth, Bootstrap, Blazor nav, LDAP, and deployment pipeline for working Central UI

Bootstrap served locally with absolute paths and <base href="/">.
LDAP auth uses search-then-bind with service account for GLAuth compatibility.
CookieAuthenticationStateProvider reads HttpContext.User instead of parsing JWT.
Login/logout forms opt out of Blazor enhanced nav (data-enhance="false").
Nav links use absolute paths; seed data includes Design/Deployment group mappings.
DataConnections page loads all connections (not just site-assigned).
Site appsettings configured for Test Plant A; Site registers with Central on startup.
DeploymentService resolves string site identifier for Akka routing.
Instances page gains Create Instance form.

src/ScadaLink.DeploymentManager/DeploymentService.cs

@@ -35,6 +35,7 @@ namespace ScadaLink.DeploymentManager;
 public class DeploymentService
 {
     private readonly IDeploymentManagerRepository _repository;
+    private readonly ISiteRepository _siteRepository;
     private readonly IFlatteningPipeline _flatteningPipeline;
     private readonly CommunicationService _communicationService;
     private readonly OperationLockManager _lockManager;
@@ -44,6 +45,7 @@ public class DeploymentService
 
     public DeploymentService(
         IDeploymentManagerRepository repository,
+        ISiteRepository siteRepository,
         IFlatteningPipeline flatteningPipeline,
         CommunicationService communicationService,
         OperationLockManager lockManager,
@@ -52,6 +54,7 @@ public class DeploymentService
         ILogger<DeploymentService> logger)
     {
         _repository = repository;
+        _siteRepository = siteRepository;
         _flatteningPipeline = flatteningPipeline;
         _communicationService = communicationService;
         _lockManager = lockManager;
@@ -60,6 +63,16 @@ public class DeploymentService
         _logger = logger;
     }
 
+    /// <summary>
+    /// Resolves the site's string identifier from the numeric DB ID.
+    /// The communication layer routes by string identifier (e.g. "site-a"), not DB ID.
+    /// </summary>
+    private async Task<string> ResolveSiteIdentifierAsync(int siteId, CancellationToken cancellationToken)
+    {
+        var site = await _siteRepository.GetSiteByIdAsync(siteId, cancellationToken);
+        return site?.SiteIdentifier ?? siteId.ToString();
+    }
+
     /// <summary>
     /// WP-1: Deploy an instance to its site.
     /// WP-2: Generates unique deployment ID, computes revision hash.
@@ -128,7 +141,7 @@ public class DeploymentService
         try
         {
             // WP-1: Send to site via CommunicationService
-            var siteId = instance.SiteId.ToString();
+            var siteId = await ResolveSiteIdentifierAsync(instance.SiteId, cancellationToken);
             var command = new DeployInstanceCommand(
                 deploymentId, instance.UniqueName, revisionHash, configJson, user, DateTimeOffset.UtcNow);
 
@@ -206,7 +219,7 @@ public class DeploymentService
             instance.UniqueName, _options.OperationLockTimeout, cancellationToken);
 
         var commandId = Guid.NewGuid().ToString("N");
-        var siteId = instance.SiteId.ToString();
+        var siteId = await ResolveSiteIdentifierAsync(instance.SiteId, cancellationToken);
         var command = new DisableInstanceCommand(commandId, instance.UniqueName, DateTimeOffset.UtcNow);
 
         var response = await _communicationService.DisableInstanceAsync(siteId, command, cancellationToken);
@@ -247,7 +260,7 @@ public class DeploymentService
             instance.UniqueName, _options.OperationLockTimeout, cancellationToken);
 
         var commandId = Guid.NewGuid().ToString("N");
-        var siteId = instance.SiteId.ToString();
+        var siteId = await ResolveSiteIdentifierAsync(instance.SiteId, cancellationToken);
         var command = new EnableInstanceCommand(commandId, instance.UniqueName, DateTimeOffset.UtcNow);
 
         var response = await _communicationService.EnableInstanceAsync(siteId, command, cancellationToken);
@@ -289,7 +302,7 @@ public class DeploymentService
             instance.UniqueName, _options.OperationLockTimeout, cancellationToken);
 
         var commandId = Guid.NewGuid().ToString("N");
-        var siteId = instance.SiteId.ToString();
+        var siteId = await ResolveSiteIdentifierAsync(instance.SiteId, cancellationToken);
         var command = new DeleteInstanceCommand(commandId, instance.UniqueName, DateTimeOffset.UtcNow);
 
         var response = await _communicationService.DeleteInstanceAsync(siteId, command, cancellationToken);