Add comprehensive XML documentation to configuration and DI

Completes Phase 7 by documenting configuration options and dependency
injection setup - critical for users getting started with the library.

Documented classes:
- TypedClientServiceCollectionExtensions: Both AddGotenbergSharpClient
  overloads with setup guidance and appsettings.json examples
- GotenbergSharpClientOptions: All properties with defaults and use cases
  (TimeOut: 3min, ServiceUrl: localhost:3000, RetryPolicy, BasicAuth)
- RetryOptions: All retry configuration properties with exponential
  backoff formula and defaults

Key improvements:
- CRITICAL: Users now know how to configure the client via DI
- Documented all default values (TimeOut, ServiceUrl, RetryCount, etc.)
- Explained exponential backoff formula: Math.Pow(BackoffPower, retryAttempt)
- Clarified Docker Compose URL setup (http://gotenberg:3000)
- Documented retry behavior (disabled by default, 3 retries when enabled)
- Added appsettings.json section guidance

This documentation is essential for first-time users setting up the client.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: Jaben

src/Gotenberg.Sharp.Api.Client/Domain/Settings/GotenbergSharpClientOptions.cs

@@ -15,18 +15,37 @@
 
 namespace Gotenberg.Sharp.API.Client.Domain.Settings;
 
+/// <summary>
+/// Configuration options for GotenbergSharpClient.
+/// </summary>
+/// <remarks>
+/// Configure these options in appsettings.json under the "GotenbergSharpClient" section
+/// or programmatically using services.Configure&lt;GotenbergSharpClientOptions&gt;().
+/// </remarks>
 public class GotenbergSharpClientOptions
 {
+    /// <summary>
+    /// HTTP timeout for requests to Gotenberg. Default: 3 minutes.
+    /// Increase this for large documents or complex conversions that may take longer to process.
+    /// </summary>
     public TimeSpan TimeOut { get; set; } = TimeSpan.FromMinutes(3);
 
+    /// <summary>
+    /// Base URL of the Gotenberg service. Default: http://localhost:3000.
+    /// Set this to your Gotenberg instance URL (e.g., http://gotenberg:3000 in Docker Compose).
+    /// </summary>
     public Uri ServiceUrl { get; set; } = new Uri("http://localhost:3000");
 
     /// <summary>
-    /// Convenience property for specifying a health check URL.
+    /// Convenience property for specifying a health check URL. Default: http://localhost:3000/health.
     /// Note: This property is not currently used by the library.
     /// </summary>
     public Uri HealthCheckUrl { get; set; } = new Uri("http://localhost:3000/health");
 
+    /// <summary>
+    /// Retry policy configuration for handling transient failures. Default: Disabled with 3 retries when enabled.
+    /// Configure retry count, exponential backoff, and logging options.
+    /// </summary>
     public RetryOptions RetryPolicy { get; set; } = new RetryOptions();
 
     /// <summary>

src/Gotenberg.Sharp.Api.Client/Domain/Settings/RetryOptions.cs

@@ -15,18 +15,33 @@
 
 namespace Gotenberg.Sharp.API.Client.Domain.Settings;
 
+/// <summary>
+/// Configuration options for retry behavior when requests to Gotenberg fail due to transient errors.
+/// </summary>
 public class RetryOptions
 {
+    /// <summary>
+    /// Enables or disables retry behavior. Default: false (disabled).
+    /// When enabled, failed requests will be retried with exponential backoff.
+    /// </summary>
     public bool Enabled { get; set; }
 
+    /// <summary>
+    /// Number of retry attempts for failed requests. Default: 3.
+    /// Only applies when Enabled is true.
+    /// </summary>
     public int RetryCount { get; set; } = 3;
 
     /// <summary>
-    ///  Configures the sleep duration provider with an exponential wait time between retries. 
-    ///  E.G. sleepDurationProvider: retryCount => TimeSpan.FromSeconds(Math.Pow(retryOps.BackoffPower, retryCount))
+    /// Exponential backoff power for calculating sleep duration between retries. Default: 1.5.
+    /// Sleep duration is calculated as: TimeSpan.FromSeconds(Math.Pow(BackoffPower, retryAttempt)).
+    /// Higher values result in longer waits between retries.
     /// </summary>
-
     public double BackoffPower { get; set; } = 1.5;
 
+    /// <summary>
+    /// Enables or disables logging of retry attempts. Default: true.
+    /// When enabled, retry attempts and failures are logged for debugging.
+    /// </summary>
     public bool LoggingEnabled { get; set; } = true;
 }

src/Gotenberg.Sharp.Api.Client/Extensions/TypedClientServiceCollectionExtensions.cs

@@ -25,8 +25,22 @@
 
 namespace Gotenberg.Sharp.API.Client.Extensions;
 
+/// <summary>
+/// Extension methods for registering GotenbergSharpClient with dependency injection.
+/// </summary>
 public static class TypedClientServiceCollectionExtensions
 {
+    /// <summary>
+    /// Registers GotenbergSharpClient with dependency injection using configured options.
+    /// Configure options via appsettings.json or by calling services.Configure&lt;GotenbergSharpClientOptions&gt;().
+    /// </summary>
+    /// <param name="services">The service collection.</param>
+    /// <returns>An IHttpClientBuilder for further configuration.</returns>
+    /// <exception cref="ArgumentNullException">Thrown when services is null.</exception>
+    /// <remarks>
+    /// This method configures the HttpClient with automatic compression, retry policies, and basic authentication if credentials are provided.
+    /// Options should be configured in the "GotenbergSharpClient" section of appsettings.json or programmatically.
+    /// </remarks>
     public static IHttpClientBuilder AddGotenbergSharpClient(
         this IServiceCollection services)
     {
@@ -51,7 +65,17 @@ public static IHttpClientBuilder AddGotenbergSharpClient(
             });
     }
 
-    
+    /// <summary>
+    /// Registers GotenbergSharpClient with dependency injection using a custom HttpClient configuration.
+    /// </summary>
+    /// <param name="services">The service collection.</param>
+    /// <param name="configureClient">Action to configure the HttpClient instance.</param>
+    /// <returns>An IHttpClientBuilder for further configuration.</returns>
+    /// <exception cref="ArgumentNullException">Thrown when configureClient is null.</exception>
+    /// <remarks>
+    /// This overload allows full control over HttpClient configuration. The client is configured with
+    /// automatic compression, timeout handling, and exponential backoff retry policies.
+    /// </remarks>
     public static IHttpClientBuilder AddGotenbergSharpClient(
         this IServiceCollection services,
         Action<IServiceProvider, HttpClient> configureClient)