Six KPIs put the request's interval criterion into the query as
DATE_TRUNC('<interval>', ...) unchecked, reachable by staff down to
TechRestricted (security review F26). New KPIFetcher.DateTruncUnitOrNull
accepts only PostgreSQL's date_trunc unit names (any case); the seven KPIs that
read interval refuse anything else with "Invalid 'interval' criteria", the same
form as their existing missing-criteria errors. The client only sends day or
month. (WorkOrderByStatusList reads interval without using it; checked too.)
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
