refactor(swagger): Read SwaggerConfiguration from appsettings

- Update AddSwaggerDocumentation to accept IConfiguration parameter
- Read SwaggerSettings from configuration (Title/Version/Description)
- Replace hardcoded values with dynamic settings
- Add Microsoft.Extensions.Options using for IOptions support

DocumentOperator.API/Configuration/SwaggerConfiguration.cs

@@ -1,4 +1,5 @@
-using Microsoft.OpenApi.Models;
+using Microsoft.Extensions.Options;
+using Microsoft.OpenApi.Models;
 using System.Reflection;
 
 namespace DocumentOperator.API.Configuration
@@ -12,16 +13,22 @@ namespace DocumentOperator.API.Configuration
         /// Adds Swagger documentation generation to the service collection.
         /// </summary>
         /// <param name="services">The service collection to add Swagger to.</param>
+        /// <param name="configuration">Configuration to read SwaggerSettings from.</param>
         /// <returns>The modified service collection.</returns>
-        public static IServiceCollection AddSwaggerDocumentation(this IServiceCollection services)
+        public static IServiceCollection AddSwaggerDocumentation(
+            this IServiceCollection services,
+            IConfiguration configuration)
         {
+            var swaggerSettings = configuration.GetSection(SwaggerSettings.SectionName).Get<SwaggerSettings>()
+                ?? new SwaggerSettings();
+
             services.AddSwaggerGen(options =>
             {
-                options.SwaggerDoc("v1", new OpenApiInfo
+                options.SwaggerDoc(swaggerSettings.Version, new OpenApiInfo
                 {
-                    Title = "DD Document Operator API",
-                    Version = "v1",
-                    Description = "PDF Verarbeitungs-Service für Validierung, Stempel, Zertifikate, Anhänge & Zusammenführung"
+                    Title = swaggerSettings.Title,
+                    Version = swaggerSettings.Version,
+                    Description = swaggerSettings.Description
                 });
 
                 // Resolve conflicting actions: Keep first variant