Functional area the record relates to.
Stable, machine-readable code (e.g. DA-MANIFEST-FETCH-FAILED).
OptionalcontextOptional JSON-serialisable structured context. Never contains secrets.
Severity of the record.
Human-readable message.
Unix epoch milliseconds when the record was created.
Machine-readable diagnostic record (stable
code,category, JSON-serialisablecontext) behindonDiagnostic()andexportDiagnostics().