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/test/health.e2e-spec.ts

@@ -1,6 +1,7 @@
 import { INestApplication } from '@nestjs/common';
 import request from 'supertest';
 import { App } from 'supertest/types';
+import { PrismaThrottlerStorage } from '../src/common/throttler/prisma-throttler.storage';
 import { createTestApp } from './utils/create-test-app';
 
 describe('Health (e2e)', () => {
@@ -27,4 +28,34 @@ describe('Health (e2e)', () => {
       .expect(200)
       .expect({ status: 'ok' });
   });
+
+  describe('when the throttler storage is down', () => {
+    afterEach(() => jest.restoreAllMocks());
+
+    it('GET /health stays 200 (liveness must not depend on the database)', async () => {
+      jest
+        .spyOn(app.get(PrismaThrottlerStorage), 'increment')
+        .mockRejectedValue(new Error('db down'));
+
+      await request(app.getHttpServer()).get('/health').expect(200);
+    });
+
+    it('GET /health/ready stays throttled (fails with the storage)', async () => {
+      jest
+        .spyOn(app.get(PrismaThrottlerStorage), 'increment')
+        .mockRejectedValue(new Error('db down'));
+
+      await request(app.getHttpServer()).get('/health/ready').expect(500);
+    });
+
+    it('other routes fail closed instead of being allowed', async () => {
+      jest
+        .spyOn(app.get(PrismaThrottlerStorage), 'increment')
+        .mockRejectedValue(new Error('db down'));
+
+      await request(app.getHttpServer())
+        .get('/api/v1/public/batches/NONE-x')
+        .expect(500);
+    });
+  });
 });