feat(swagger): Add SwaggerSettings configuration class

- Add SwaggerSettings with EnableInProduction flag (default: true)
- Title, Version, Description configurable via appsettings.json
- Enables production Swagger access for debugging/testing

DocumentOperator.API/Configuration/SwaggerSettings.cs

@@ -0,0 +1,33 @@
+namespace DocumentOperator.API.Configuration;
+
+/// <summary>
+/// Configuration settings for Swagger/OpenAPI documentation.
+/// </summary>
+public class SwaggerSettings
+{
+    /// <summary>
+    /// 
+    /// </summary>
+    public const string SectionName = "SwaggerSettings";
+
+    /// <summary>
+    /// Enable Swagger UI in Production environment.
+    /// Default: true (allows production testing/debugging).
+    /// </summary>
+    public bool EnableInProduction { get; set; } = true;
+
+    /// <summary>
+    /// API title displayed in Swagger UI.
+    /// </summary>
+    public string Title { get; set; } = "DocumentOperator API";
+
+    /// <summary>
+    /// API version.
+    /// </summary>
+    public string Version { get; set; } = "v1";
+
+    /// <summary>
+    /// API description displayed in Swagger UI.
+    /// </summary>
+    public string Description { get; set; } = "PDF document processing service";
+}