Gather diagnostic info

[gkc]

Is your feature request related to a problem? Please describe.

Currently it is difficult if not impossible to diagnose some issues, especially sync, short of debugging jointly with a customer. Even then, some info is not readily available

Describe the solution you'd like

Implement a simple DiagosticService and simple DiagnosticObserver

Enhance AtClient to share diagnostics via the DiagnosticsService. Initially support streaming of data mutation events (out or delete in AtClient) and detailed sync processing events.

Create a simple implementation of a client of the DiagnosticsService which developer can use to gather and share diagnostic info with minimum effort

Describe alternatives you've considered

No response

Additional context

No response