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/inspections.e2e-spec.ts

@@ -9,6 +9,7 @@ import { login } from './utils/api';
 interface InspectionBody {
   id: string;
   colonyId: string;
+  broodFrames?: number | null;
 }
 
 interface TaskBody {
@@ -142,4 +143,32 @@ describe('Inspections (e2e)', () => {
     taskId = task.id;
     expect(task.sourceInspectionId).toBe(inspectionId);
   });
+
+  it('stores, clears and validates broodFrames', async () => {
+    const created = await request(app.getHttpServer())
+      .post('/api/v1/inspections')
+      .set('Authorization', `Bearer ${staffToken}`)
+      .send({ colonyId, date: new Date().toISOString(), broodFrames: 4 })
+      .expect(201);
+    const id = (created.body as InspectionBody).id;
+    expect((created.body as InspectionBody).broodFrames).toBe(4);
+
+    const cleared = await request(app.getHttpServer())
+      .patch(`/api/v1/inspections/${id}`)
+      .set('Authorization', `Bearer ${staffToken}`)
+      .send({ broodFrames: null })
+      .expect(200);
+    expect((cleared.body as InspectionBody).broodFrames).toBeNull();
+
+    await request(app.getHttpServer())
+      .patch(`/api/v1/inspections/${id}`)
+      .set('Authorization', `Bearer ${staffToken}`)
+      .send({ broodFrames: -1 })
+      .expect(400);
+    await request(app.getHttpServer())
+      .patch(`/api/v1/inspections/${id}`)
+      .set('Authorization', `Bearer ${staffToken}`)
+      .send({ broodFrames: 'x' })
+      .expect(400);
+  });
 });