refactor(time): change DateTime from UTC to local time

- Change HealthCheckHtmlGenerator to use DateTime.Now instead of DateTime.UtcNow
- Change ProfileWorker health check timestamps to use DateTime.Now
- Change Program health check endpoint to use DateTime.Now
- Ensures consistent local time usage across the application

ECMJobRunner.WebCron/HealthCheck/HealthCheckHtmlGenerator.cs

@@ -112,7 +112,7 @@ public static class HealthCheckHtmlGenerator
                     <h1 class=""mb-2"">");
         sb.Append(icon);
         sb.Append($@" Health Check Status</h1>
-                    <p class=""text-muted mb-0"">Last checked: {DateTime.UtcNow:yyyy-MM-dd HH:mm:ss} UTC</p>
+                    <p class=""text-muted mb-0"">Last checked: {DateTime.Now:yyyy-MM-dd HH:mm:ss} UTC</p>
                 </div>
                 <div>
                     <h2><span class=""badge {badgeClass} fs-3"">{report.Status}</span></h2>

ECMJobRunner.WebCron/ProfileWorker/ProfileWorker.cs

@@ -67,7 +67,7 @@ public class ProfileWorker(
                 await work.ExecuteAsync(stoppingToken);
 
                 // Success - update health state
-                _lastSuccessfulRun = DateTime.UtcNow;
+                _lastSuccessfulRun = DateTime.Now;
                 _consecutiveFailures = 0;
                 _lastException = null;
 
@@ -151,7 +151,7 @@ public class ProfileWorker(
             ));
         }
 
-        var timeSinceLastSuccess = DateTime.UtcNow - _lastSuccessfulRun.Value;
+        var timeSinceLastSuccess = DateTime.Now - _lastSuccessfulRun.Value;
         
         // Adaptive multiplier: 3x for fast intervals (<10s), 1.5x for slower intervals
         // This ensures faster problem detection when using longer intervals (e.g., 60s)

ECMJobRunner.WebCron/Program.cs

@@ -2,6 +2,7 @@ using ECMJobRunner.Application;
 using ECMJobRunner.Infrastructure;
 using ECMJobRunner.WebCron;
 using ECMJobRunner.WebCron.HealthCheck;
+using ECMJobRunner.WebCron.Middleware;
 using ECMJobRunner.WebCron.ProfileWorker;
 using Hangfire;
 using Hangfire.SqlServer;
@@ -65,7 +66,7 @@ builder.Services.AddJobRunnerInfrastructure(cnnStr);
 
 var recClientApiUrl = builder.Configuration.GetValue<string>("ReC:ApiUrl")
     ?? throw new InvalidOperationException("ReC:ApiUrl not found.");
-builder.Services.AddJobRunnerServices(recClientApiUrl);
+builder.Services.AddJobRunnerServices(recClientApiUrl, builder.Configuration);
 
 // Get Hangfire storage configuration
 var useInMemory = builder.Configuration.GetValue<bool>("Hangfire:InMemory");
@@ -105,7 +106,7 @@ builder.Services.AddSwaggerGen();
 
 // Add health checks
 builder.Services.AddHealthChecks()
-    .AddCheck<ProfileWorker>("profile-worker", tags: new[] { "ready", "worker" });
+    .AddCheck<ProfileWorker>("profile-worker", tags: ["ready", "worker"]);
 
 // Add Serilog.UI with SQLite provider - use same path from configuration
 var serilogUiLogDirectory = builder.Configuration.GetValue<string>("Application:LogDirectory")
@@ -123,6 +124,8 @@ builder.Services.AddSerilogUi(logUIOpt =>
 
 var app = builder.Build();
 
+app.UseMiddleware<ExceptionHandlingMiddleware>();
+
 // Configure the HTTP request pipeline.
 if (app.Environment.IsDevelopment())
 {
@@ -171,7 +174,7 @@ app.MapHealthChecks("/health", new Microsoft.AspNetCore.Diagnostics.HealthChecks
         var result = System.Text.Json.JsonSerializer.Serialize(new
         {
             status = report.Status.ToString(),
-            timestamp = DateTime.UtcNow,
+            timestamp = DateTime.Now,
             checks = report.Entries.Select(e => new
             {
                 name = e.Key,