Add option to send the User-Agent header on all HTTP requests (#750)

code/backend/Cleanuparr.Infrastructure/Http/DynamicHttpClientSystem/RetryConfig.cs

@@ -0,0 +1,10 @@
+namespace Cleanuparr.Infrastructure.Http.DynamicHttpClientSystem;
+
+/// <summary>
+/// Retry configuration for HTTP clients
+/// </summary>
+public class RetryConfig
+{
+    public int MaxRetries { get; set; }
+    public bool ExcludeUnauthorized { get; set; } = true;
+}