- IContextualSerilogLogger<T> / ContextualSerilogLogger<T> in Services/Logging
(handlers get a ForContext<T>-scoped logger via DI, consistent with ItemTracker)
- SerilogRegistrar extension on WebApplicationBuilder (Api)
- SerilogRegistrar extension on HostApplicationBuilder (Worker)
- Both registrars: set Log.Logger, wire Logging + Host/Services, register ILogger singleton
- ServiceCollectionExtensions: register IContextualSerilogLogger<> as transient
- Program.cs in both apps simplified to single builder.AddSerilog() call
Ref: IT-628
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>