Module error 

Error types and per-record skip reporting for the face core surface.

FaceError is the typed library error returned from fallible operations. SkipReport / SkipReason describe non-fatal per-record skip events surfaced to stderr and counted in crate::Envelope’s result.skipped field (§11.1 of docs/design.md).

Structs

DetectionCandidate

One candidate field surfaced when auto-detection cannot pick a grouping field on its own.

SkipReport

One per-record skip event (§11.1).

Enums

FaceError

Library-level error returned by the face core surface.

SkipReason

Reason a single input record was skipped during processing.