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/ProfileWorkerOptions.cs

@@ -2,14 +2,22 @@ namespace ECMJobRunner.WebCron.ProfileWorker;
 
 /// <summary>
 /// Configuration options for ProfileWorker background service.
+/// Binds to "ProfileWorker" section in appsettings.json.
 /// </summary>
 public class ProfileWorkerOptions
 {
+    /// <summary>
+    /// Configuration section name for binding options.
+    /// </summary>
     public const string SectionName = "ProfileWorker";
 
     /// <summary>
     /// Interval in milliseconds between profile synchronization checks.
-    /// Default: 1000ms (1 second)
+    /// Default: 1000ms (1 second).
     /// </summary>
+    /// <remarks>
+    /// Lower values increase responsiveness but consume more resources.
+    /// Recommended range: 1000-5000ms.
+    /// </remarks>
     public int IntervalMS { get; set; } = 1000;
 }