feat: platform backbone and field capture, first part (checkpoint)

Platform backbone (plan 2026-10-13-plattform-rueckgrat), reviewed tasks:
- run roles api/worker/job/all with shared startup checks (Task 1)
- schema and migration for DomainEvent, deliveries, JobRun, ThrottlerHit (Task 2)
- audit, notifications and domain events written in the same transaction (Task 3)
- dispatcher with SKIP LOCKED claims, retries and stale release (Task 4)
- worker building blocks: tick, LISTEN/NOTIFY wake-up, health (Task 5)
- worker process and entry points (Task 6)
- throttler counters in Postgres (Task 19)
- separate keys per purpose with key ring (Task 20)
- public origin page without exact location (Task 22)
- shop keys split into read and write (Task 23)
- Kustomize base, components, overlay encry, CI validation (Task 26)

Field capture T3 (plan 2026-10-13-t3-erfassung-am-stand), reviewed tasks:
- brood frames, read endpoints, apiary overview and offline pack
- network basics, offline queue v3, navigation sheets, form building blocks
- new inspection with last-time hints and weather, varroa per day,
  treatment prefill, apiary page with round
- inspection photo (Task 10) is implemented, review pending

Not rolled out. Remaining tasks follow in later commits.

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

ApiCore-Backend/src/common/worker-wakeup.ts

@@ -0,0 +1,24 @@
+import { DbClient } from '../prisma/db-client';
+
+/** LISTEN/NOTIFY channels the worker loops wait on, one per outbox. */
+export const WAKE_CHANNELS = {
+  domainEvents: 'domain_event',
+  calendarSync: 'calendar_sync',
+  webhookDeliveries: 'webhook_delivery',
+} as const;
+
+export type WakeChannel = (typeof WAKE_CHANNELS)[keyof typeof WAKE_CHANNELS];
+
+/**
+ * Wakes the worker loop behind `channel` before its next poll. The payload
+ * is always empty: the loop reads its work from the table, so nothing can
+ * leak through the channel or be slipped in as work. On a transaction
+ * client Postgres sends the notification only on commit - a rolled-back
+ * write wakes nobody. A lost notification only delays work until the poll.
+ */
+export async function notifyWorker(
+  db: DbClient,
+  channel: WakeChannel,
+): Promise<void> {
+  await db.$executeRaw`SELECT pg_notify(${channel}, '')`;
+}