Use full Event ID and the event name

[vordimous]

Is your feature request related to a problem? Please describe.
Log messages can use as much context as possible. This will help observability admins filter and track information more easily.

Update the log message fields to be more human-readable and self-descriptive.

Describe the solution you'd like
When logging Events, use the full event ID formatted as the event name. model.protobuf.validation.failed becomes MODEL_PROTOBUF_VALIDATION_FAILED.