A materialized copy of an M5 group stateful template (cron/queue/email) now
reads as `materialized = true` — inherited, read-only — distinct from a
hand-authored trigger. Threads a derived `materialized` bool (=
`materialized_from IS NOT NULL`) row → domain → API → CLI, mirroring the
`sealed`/`shared` columns; `list_for_app` SELECTs `materialized_from`. No
migration.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>