feat: Add Hangfire cronjob system with web dashboard, Windows Service support, and Serilog file/console logging

- Add Hangfire packages (AspNetCore, Core, InMemory, SqlServer) with configurable storage (InMemory vs SQL Server)
- Configure Hangfire dashboard at /hangfire with AllowAllDashboardAuthorizationFilter (no auth for development)
- Add Microsoft.Extensions.Hosting.WindowsServices package with conditional UseWindowsService() based on HostingOptions:UseWindowsService config
- Create ProfileManager BackgroundService with IServiceScopeFactory for scoped service resolution per iteration
- Create AllowAllDashboardAuthorizationFilter for Hangfire dashboard access
- Create DtoExtensions with JobId() and ToJob() helper methods
- Configure Serilog with file sink (Production: Logs/log-.txt, daily rolling, 30 day retention) and console sink (Development)
- Add Serilog enrichers: FromLogContext, WithMachineName, WithThreadId
- Update appsettings.json with Hangfire:InMemory flag, HostingOptions:UseWindowsService flag, and Serilog configuration
- Create appsettings.Development.json with console-specific Serilog configuration

ECMJobRunner.WebCron/appsettings.json

@@ -1,4 +1,27 @@
 {
+  "Serilog": {
+    "Using": [ "Serilog.Sinks.File" ],
+    "MinimumLevel": {
+      "Default": "Information",
+      "Override": {
+        "Microsoft.AspNetCore": "Warning",
+        "Microsoft.EntityFrameworkCore": "Warning",
+        "Hangfire": "Information"
+      }
+    },
+    "WriteTo": [
+      {
+        "Name": "File",
+        "Args": {
+          "path": "Logs/log-.txt",
+          "rollingInterval": "Day",
+          "outputTemplate": "[{Timestamp:yyyy-MM-dd HH:mm:ss.fff zzz}] [{Level:u3}] {Message:lj}{NewLine}{Exception}",
+          "retainedFileCountLimit": 30
+        }
+      }
+    ],
+    "Enrich": [ "FromLogContext", "WithMachineName", "WithThreadId" ]
+  },
   "Logging": {
     "LogLevel": {
       "Default": "Information",