`/api/v1/admin/apps/{id}/triggers/*` — separate POST endpoints per
kind (kv / dead_letter) so each request validates against the
correct shape. List and DELETE work across both kinds.
Gated on `Capability::AppManageTriggers(app_id)`, which maps onto
`Scope::AppAdmin` (no new scope variants — seven-scope commitment
held) and is granted at the per-app `AppAdmin` role.
Request payloads accept `dispatch_mode` (defaults to `async`) and
retry-override fields. Omitted retry fields fall back to
`TriggerConfig::from_env`, which the binary plumbs into
`TriggersState` so the row is auditable from itself (no lazy
resolution at dispatch time). `registered_by_principal` is taken
from the authenticated principal — design notes §4: "a trigger
execution runs as the principal that registered the trigger".
DELETE loads the trigger first and 404s if its `app_id` doesn't
match the path — prevents a caller with rights on app A from
deleting a trigger via app B's path (bound-key safety net).
In-memory tests cover: app-not-found, member-without-role 403,
default-fallback for retry settings when request omits them,
empty-glob rejection, cross-app delete is treated as not-found.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>