Refactor job execution to remove Quartz and job runner

Simplify FinalizeDocumentJob execution by removing Quartz dependencies and the IFinalizeDocumentJobRunner abstraction. The job now uses an ExecuteAsync method with direct access to configuration and options via dependency injection. Worker is updated to call the job directly, and service registration is streamlined. This improves clarity and integration with .NET DI.

EnvelopeGenerator.ServiceHost/Worker.cs

@@ -1,16 +1,18 @@
+using EnvelopeGenerator.ServiceHost.Jobs;
+
 namespace EnvelopeGenerator.ServiceHost;
 
 public class Worker : BackgroundService
 {
     private readonly ILogger<Worker> _logger;
     private readonly int _delayMilliseconds;
-    private readonly IFinalizeDocumentJobRunner _jobRunner;
+    private readonly FinalizeDocumentJob _finalizeDocumentJob;
 
-    public Worker(ILogger<Worker> logger, IConfiguration configuration, IFinalizeDocumentJobRunner jobRunner)
+    public Worker(ILogger<Worker> logger, IConfiguration configuration, FinalizeDocumentJob finalizeDocumentJob)
     {
         _logger = logger;
         _delayMilliseconds = Math.Max(1, configuration.GetValue("Worker:DelayMilliseconds", 1000));
-        _jobRunner = jobRunner;
+        _finalizeDocumentJob = finalizeDocumentJob;
     }
 
     protected override async Task ExecuteAsync(CancellationToken stoppingToken)
@@ -22,7 +24,7 @@ public class Worker : BackgroundService
                 _logger.LogInformation("Worker running at: {time}", DateTimeOffset.Now);
             }
 
-            await _jobRunner.RunAsync(stoppingToken);
+            await _finalizeDocumentJob.ExecuteAsync(stoppingToken);
             await Task.Delay(_delayMilliseconds, stoppingToken);
         }
     }