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]>

deploy/k8s/components/network-policies/frontend.yaml

@@ -0,0 +1,28 @@
+# Frontend: Anfragen nur von Traefik. Raus nur zum Backend auf 3001, kein
+# Weg zu Postgres und keiner ins Internet.
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: apicore-frontend
+spec:
+  podSelector:
+    matchLabels:
+      app: apicore-frontend
+  policyTypes: [Ingress, Egress]
+  ingress:
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: kube-system
+          podSelector:
+            matchLabels:
+              app.kubernetes.io/name: rke2-traefik
+      ports:
+        - {protocol: TCP, port: 3000}
+  egress:
+    - to:
+        - podSelector:
+            matchLabels:
+              app: apicore-backend
+      ports:
+        - {protocol: TCP, port: 3001}