Module observability 

Structs

CompositeObserver

An observer that fans out callbacks to a list of observers.

FileObserver

Appends ingestion events to a local log file.

IngestionContext

Context about an ingestion attempt.

IngestionStats

Minimal stats reported on successful ingestion.

StdErrObserver

Logs ingestion events to stderr.

Enums

IngestionSeverity

Severity classification used for observer callbacks and alerting thresholds.

Traits

IngestionObserver

Observer interface for ingestion outcomes.