Errors
EVIDENCE_KIND_INVALID
An evidence kind is malformed, reserved, or cannot be resolved.
What failed
Inline custom evidence did not use a valid non-empty custom.* kind, or a
referenced source had no trusted resolvable canonical kind.
Retryability
Not retryable. The kind must be corrected.
The diagnostic does not return the rejected application-authored kind.
Fix
Use custom.your-kind for inline authoring. When linking a remote artifact,
pass its exact valid canonical or custom.* kind.