Seed gallery_expiring / gallery_expired built-ins and make the live automations
flow-owned, with zero feature loss:
- New delegating actions (notify_gallery_expiring / notify_gallery_expired /
notify_pre_event) call the EXISTING send functions, so the engine path is
byte-identical to the legacy hourly checker/pass (same templates, recipients,
variables, dedup, per-event overrides, sent_at idempotency).
- Cutover built-ins (invoice_dunning, gallery_expiring, gallery_expired,
pre_event_email) now ship ENABLED; booking flows stay disabled (stubs).
- The legacy paths stand down via existence-based isBuiltinFlowPresent guards:
once a built-in is seeded (flag on) the engine is the single switch — flow
enabled = it sends, flow disabled = off — so no double-send and reminders/
expiry emails can still be fully turned off.
- emitDueEventReminders now honours the per-event reminder controls
(disabled / offset / sent_at) so pre-event timing is faithful; fixed a
Number(null)===0 offset bug.
Settings UI cutover is gated on the `workflows` flag (default off): when the
engine is live, the dunning reminder schedule (CRM settings) and the pre-event
global toggle (Reminder emails) are replaced with a "now in Workflows" callout;
when it's off, the legacy controls stay so flag-off installs lose nothing. The
late-fee math and installment-trigger defaults stay (fee math / scheduler-owned).
Split/installment invoices intentionally remain scheduler-driven (no flow).
Luca
0b6c33e59a