The named template entity a diagnostic is attributed to, when it targets
one. The entity type is the singular form of the top-level template
section the entity is declared in.
Outcome of a validation run. Ok means validation completed without
correctness-affecting curtailment. AnalysisIncomplete means a deterministic
budget curtailed analysis in a way that could omit findings. Error means
the validation pipeline could not run, such as when parsing fails.