Done :
- move metrics and health cache services from health module to metrics
module
- refactor metrics counter from specific method to set up from enum keys
- add OpenTelemetry (Otel) instrumentation for metrics
- set up Otel SDK to send metrics to Otel collector
To do later :
- implement Otel instrumentation for traces + plug Sentry on top
- Improve snackbar to enable displaying multi-line message (so far we
only displayed the first few words which was very frustrating)
- Followup on previous issue to enable tim@apple.dev on the demo
workspace (prefilled automatically)
- Fix sentry tracing which had been broken when migrating from v7 to v8
