feat(triggers): show a materialized column in pic triggers ls --app (D1)

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>

crates/manager-core/src/apply_service.rs

@@ -4121,6 +4121,7 @@ mod tests {
             enabled: true,
             sealed: false,
             shared: false,
+            materialized: false,
             dispatch_mode: TriggerDispatchMode::Async,
             retry_max_attempts: 3,
             retry_backoff: BackoffShape::Exponential,