* telemetry: split webhook-processed hook registration out of NewTelemetryService
NewTelemetryService used to register a notifier processed-hook on the inner
*telemetryService directly. That made it impossible for downstream wrappers
(e.g. cloud's TelemetryService that overrides Webhook to fan out to a v3
observability pipeline) to intercept webhook events without double-firing
the legacy emission.
Lift the registration into a new exported helper RegisterWebhookHook, and
have the standalone server's wire provider createTelemetryService call it
right after construction so behavior is unchanged for callers that don't
wrap the service.
Paul Wells
2dd5e63207