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/documents.e2e-spec.ts

@@ -189,4 +189,35 @@ describe('Documents (e2e)', () => {
       .set('Authorization', `Bearer ${beekeeperToken}`)
       .expect(204);
   });
+
+  it('replays an upload with the same Idempotency-Key', async () => {
+    const key = `idem-documents-${Date.now()}-upload-0001`;
+    const upload = () =>
+      request(app.getHttpServer())
+        .post('/api/v1/documents')
+        .set('Authorization', `Bearer ${beekeeperToken}`)
+        .set('Idempotency-Key', key)
+        .field('entityType', 'COLONY')
+        .field('entityId', colonyId)
+        .attach('file', PNG_BYTES, {
+          filename: 'idempotent.png',
+          contentType: 'image/png',
+        })
+        .expect(201);
+    const before = await prisma.document.count({
+      where: { entityType: 'COLONY', entityId: colonyId },
+    });
+
+    const first = await upload();
+    const second = await upload();
+
+    expect((second.body as DocumentBody).id).toBe(
+      (first.body as DocumentBody).id,
+    );
+    expect(
+      await prisma.document.count({
+        where: { entityType: 'COLONY', entityId: colonyId },
+      }),
+    ).toBe(before + 1);
+  });
 });