Add XML documentation for improved code clarity

Added detailed XML documentation across multiple files to enhance
code maintainability and readability. Key updates include:

- Documented `AllowAllDashboardAuthorizationFilter` to clarify
  its development-only usage.
- Added comments to `DtoExtensions` for Hangfire job ID generation
  and DTO-to-command conversion methods.
- Enhanced `HealthCheckHtmlGenerator` with detailed descriptions
  of HTML generation methods and utility functions.
- Documented `DependencyInjection` and `ProfileWorkerOptionsValidator`
  to explain service registration and configuration validation.
- Updated `ProfileCache` with comments on thread-safe operations.
- Added documentation to `ProfileWork` for profile synchronization
  logic and execution flow.
- Enhanced `ProfileWorker` with health check logic and background
  service execution details.
- Documented `ProfileWorkerOptions` configuration properties.

These changes aim to improve developer understanding and ensure
best practices are followed in production environments.

ECMJobRunner.WebCron/ProfileWorker/ProfileWork.cs

@@ -5,9 +5,31 @@ using MediatR;
 
 namespace ECMJobRunner.WebCron.ProfileWorker;
 
-
+/// <summary>
+/// Handles the core business logic for synchronizing profiles between the database and Hangfire.
+/// Responsible for adding, updating, and removing recurring jobs based on profile configuration.
+/// </summary>
+/// <param name="Logger">Logger for diagnostic output.</param>
+/// <param name="JobManager">Hangfire recurring job manager.</param>
+/// <param name="Mediator">MediatR mediator for executing commands and queries.</param>
+/// <param name="ProfileCache">Thread-safe cache for tracking profile state.</param>
 public class ProfileWork(ILogger<ProfileWork> Logger, IRecurringJobManager JobManager, IMediator Mediator, ProfileCache ProfileCache)
 {
+    /// <summary>
+    /// Synchronizes active profiles from the database with Hangfire recurring jobs.
+    /// </summary>
+    /// <param name="stoppingToken">Cancellation token for graceful shutdown.</param>
+    /// <remarks>
+    /// Execution flow:
+    /// <list type="number">
+    /// <item><description>Fetches active profiles from database via MediatR query</description></item>
+    /// <item><description>Removes jobs from Hangfire that no longer exist in the database</description></item>
+    /// <item><description>Adds or updates jobs with changed schedules</description></item>
+    /// <item><description>Updates local cache to reflect current state</description></item>
+    /// </list>
+    /// Uses HashSet for O(1) job existence checks to optimize performance.
+    /// </remarks>
+    /// <returns>A task representing the asynchronous synchronization operation.</returns>
     public async Task ExecuteAsync(CancellationToken stoppingToken)
     {
         // Fetch active profiles from database