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/ProfileCache.cs

@@ -5,19 +5,46 @@ namespace ECMJobRunner.WebCron.ProfileWorker;
 
 /// <summary>
 /// Thread-safe cache for storing active profile configurations.
-/// Used to track profile state and detect changes in schedule or removal.
+/// Uses <see cref="ConcurrentDictionary{TKey, TValue}"/> to track profile state 
+/// and detect changes in schedule or removal.
 /// </summary>
 public class ProfileCache
 {
     private readonly ConcurrentDictionary<string, CfgProfileDto> _cache = new();
 
+    /// <summary>
+    /// Retrieves a profile from the cache by job identifier.
+    /// </summary>
+    /// <param name="jobId">The unique job identifier.</param>
+    /// <returns>The cached profile, or <c>null</c> if not found.</returns>
     public CfgProfileDto? Get(string jobId) => _cache.TryGetValue(jobId, out var profile) ? profile : null;
 
+    /// <summary>
+    /// Adds a new profile or updates an existing profile in the cache.
+    /// </summary>
+    /// <param name="jobId">The unique job identifier.</param>
+    /// <param name="profile">The profile configuration to cache.</param>
     public void AddOrUpdate(string jobId, CfgProfileDto profile) => _cache[jobId] = profile;
 
+    /// <summary>
+    /// Attempts to remove a profile from the cache.
+    /// </summary>
+    /// <param name="jobId">The unique job identifier.</param>
+    /// <param name="profile">The removed profile, or <c>null</c> if not found.</param>
+    /// <returns><c>true</c> if the profile was removed; otherwise, <c>false</c>.</returns>
     public bool TryRemove(string jobId, out CfgProfileDto? profile) => _cache.TryRemove(jobId, out profile);
 
+    /// <summary>
+    /// Gets all job identifiers currently stored in the cache.
+    /// </summary>
+    /// <returns>A collection of job identifiers.</returns>
     public IEnumerable<string> GetAllJobIds() => _cache.Keys;
 
+    /// <summary>
+    /// Attempts to retrieve a profile from the cache.
+    /// </summary>
+    /// <param name="jobId">The unique job identifier.</param>
+    /// <param name="profile">The cached profile, or <c>null</c> if not found.</param>
+    /// <returns><c>true</c> if the profile was found; otherwise, <c>false</c>.</returns>
     public bool TryGetValue(string jobId, out CfgProfileDto? profile) => _cache.TryGetValue(jobId, out profile);
 }