try fix download client factory

code/Infrastructure/Http/DynamicHttpClientSystem/HttpClientConfigStore.cs

@@ -0,0 +1,38 @@
+using System.Collections.Concurrent;
+
+namespace Infrastructure.Http.DynamicHttpClientSystem;
+
+/// <summary>
+/// In-memory implementation of the HTTP client configuration store
+/// </summary>
+public class HttpClientConfigStore : IHttpClientConfigStore
+{
+    private readonly ConcurrentDictionary<string, HttpClientConfig> _configurations = new();
+    private readonly ConcurrentDictionary<string, RetryConfig> _retryConfigurations = new();
+
+    public bool TryGetConfiguration(string clientName, out HttpClientConfig config)
+    {
+        return _configurations.TryGetValue(clientName, out config!);
+    }
+
+    public void AddConfiguration(string clientName, HttpClientConfig config)
+    {
+        _configurations.AddOrUpdate(clientName, config, (_, _) => config);
+    }
+
+    public void RemoveConfiguration(string clientName)
+    {
+        _configurations.TryRemove(clientName, out _);
+        _retryConfigurations.TryRemove(clientName, out _);
+    }
+
+    public void AddRetryConfiguration(string clientName, RetryConfig retryConfig)
+    {
+        _retryConfigurations.AddOrUpdate(clientName, retryConfig, (key, oldValue) => retryConfig);
+    }
+
+    public bool TryGetRetryConfiguration(string clientName, out RetryConfig retryConfig)
+    {
+        return _retryConfigurations.TryGetValue(clientName, out retryConfig!);
+    }
+}