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/ECMJobRunner.WebCron.csproj

@@ -13,6 +13,9 @@
     <PackageReference Include="Hangfire.SqlServer" Version="1.8.23" />
     <PackageReference Include="Microsoft.Data.SqlClient" Version="7.0.2" />
     <PackageReference Include="Microsoft.Extensions.Hosting.WindowsServices" Version="10.0.9" />
+    <PackageReference Include="Serilog.AspNetCore" Version="10.0.0" />
+    <PackageReference Include="Serilog.Sinks.Console" Version="6.1.1" />
+    <PackageReference Include="Serilog.Sinks.File" Version="7.0.0" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="6.6.2" />
   </ItemGroup>