Add JobExceptionHandlingBehavior and improve mappings

Introduced `JobExceptionHandlingBehavior` to handle exceptions, log errors, and rethrow them during MediatR pipeline execution. Updated `DependencyInjection.cs` to register the new behavior and added a `recClientApiUrl` parameter for API configuration.

Enhanced `ProfileMappingProfile.cs` and `GetProfileQuery.cs` with XML documentation for better readability. Improved case-insensitive filtering in `GetProfileQuery` with conditional compilation for .NET version compatibility.

Modified `CreateProfileHistoryCommand.cs` to use a non-nullable `AddedWho` property. Added missing `using` directive in `GetProfileQuery.cs` for compatibility. These changes improve code quality, maintainability, and functionality.

ECMJobRunner.Application/DependencyInjection.cs

@@ -16,6 +16,7 @@ namespace ECMJobRunner.Application
         /// Registers MediatR, pipeline behaviors, and AutoMapper
         /// </summary>
         /// <param name="services">The service collection</param>
+        /// <param name="recClientApiUrl">The base URL for the ReC client API</param>
         /// <returns>The service collection for chaining</returns>
         public static IServiceCollection AddJobRunnerServices(this IServiceCollection services, string recClientApiUrl)
         {
@@ -37,6 +38,7 @@ namespace ECMJobRunner.Application
 
             // Register pipeline behaviors in execution order
             // Order matters: MainQuery -> CheckQuery -> ReCRequest
+            services.AddTransient(typeof(IPipelineBehavior<,>), typeof(JobExceptionHandlingBehavior<,>));
             services.AddTransient(typeof(IPipelineBehavior<,>), typeof(MainQueryExecutionBehavior<,>));
             services.AddTransient(typeof(IPipelineBehavior<,>), typeof(CheckQueryExecutionBehavior<,>));
             services.AddTransient(typeof(IPipelineBehavior<,>), typeof(ReCRequestExecutionBehavior<,>));