Accept host:port or scheme://host:port for TemporalServerHost

Changes TemporalServerHost from Uri to string so bare "host:port" values
(as used in Temporal Cloud config) bind correctly. Aspire-style
"scheme://host:port" is still handled via URI parsing fallback.

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

Author: arkoc

csharp/src/Infrastructure.DependencyInjection/TrainSolverBuilderExtensions.cs

@@ -42,7 +42,7 @@ public static TrainSolverBuilder AddTrainSolver(this IServiceCollection services
 
     private static IServiceCollection AddTemporalWorkerClient(
         this IServiceCollection services,
-        Uri serverHost,
+        string serverHost,
         string @namespace,
         string? apiKey)
     {
@@ -53,9 +53,14 @@ private static IServiceCollection AddTemporalWorkerClient(
             PropertyNameCaseInsensitive = true,
         }), new DefaultFailureConverter());
 
+        // Accepts either "host:port" or "scheme://host:port" (Aspire passes the latter)
+        var targetHost = Uri.TryCreate(serverHost, UriKind.Absolute, out var uri) && !string.IsNullOrEmpty(uri.Host)
+            ? $"{uri.Host}:{uri.Port}"
+            : serverHost;
+
         services.AddTemporalClient(otps =>
         {
-            otps.TargetHost = $"{serverHost.Host}:{serverHost.Port}";
+            otps.TargetHost = targetHost;
             otps.Namespace = @namespace;
             otps.DataConverter = dataConverter;
 

csharp/src/Infrastructure.DependencyInjection/TrainSolverOptions.cs

@@ -4,7 +4,7 @@ public class TrainSolverOptions
 {
     public const string SectionName = "TrainSolver";
 
-    public Uri TemporalServerHost { get; set; } = null!;
+    public string TemporalServerHost { get; set; } = null!;
 
     public string TemporalNamespace { get; set; } = "default";