feat: platform backbone and field capture complete (checkpoint)

Platform backbone (plan 2026-10-13-plattform-rueckgrat), all tasks reviewed:
- webhooks with delivery table, retries and stable delivery id
- calendar handlers; a finished task removes its Outlook event
- tasks, automations, inspections, varroa, treatments, feedings,
  harvests, colonies, wintering, stock and bottling record domain events
  in the same transaction; legacy post-commit calls removed
- row locks through one helper (lockRowForUpdate, lockRowsForShare,
  lockRowsForUpdate)
- job framework with JobRun, cli exit codes, cleanup, task templates,
  daily evaluation, hourly app-backup and the rekey job
- system API and page "Verwaltung > System" with retry
- @nestjs/schedule removed, guard tests against in-process schedulers

Field capture T3 (plan 2026-10-13-t3-erfassung-am-stand), all tasks reviewed:
- inspection photo offline without metadata
- bulk capture for treatments, feedings and varroa (backend + frontend)
- offline stand mode with service worker, offline pages and packs
- offline session, cold start and logout on shared devices

Docs: ARCHITECTURE.md assumptions and sections updated, TASKS.md.
Gates: backend lint, typecheck, 1770 unit, 420 e2e, build, no schema
drift; frontend lint, typecheck, 913 tests, build. Not rolled out.

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

ApiCore-Backend/test/task-templates.e2e-spec.ts

@@ -43,6 +43,18 @@ describe('TaskTemplates (e2e)', () => {
 
   afterAll(async () => {
     if (templateId) {
+      const generated = await prisma.task.findMany({
+        where: { sourceTemplateId: templateId },
+        select: { id: true },
+      });
+      const generatedIds = generated.map((task) => task.id);
+      // Written without a user, so not covered by the userId cleanup below.
+      await prisma.auditLog.deleteMany({
+        where: { entityType: 'Task', entityId: { in: generatedIds } },
+      });
+      await prisma.domainEvent.deleteMany({
+        where: { aggregateType: 'Task', aggregateId: { in: generatedIds } },
+      });
       await prisma.task.deleteMany({ where: { sourceTemplateId: templateId } });
       await prisma.taskTemplate.delete({ where: { id: templateId } });
     }
@@ -88,15 +100,51 @@ describe('TaskTemplates (e2e)', () => {
       .set('Authorization', `Bearer ${beekeeperToken}`)
       .expect(200);
 
-    const generatedTask = await prisma.task.findFirst({
+    const generated = await prisma.task.findMany({
       where: { sourceTemplateId: templateId },
     });
-    expect(generatedTask).not.toBeNull();
+    expect(generated).toHaveLength(1);
+    const [generatedTask] = generated;
+    expect(generatedTask.createdByUserId).toBeNull();
 
     const template = await prisma.taskTemplate.findUniqueOrThrow({
       where: { id: templateId },
     });
     expect(template.nextDueDate.getTime()).toBeGreaterThan(yesterday.getTime());
+
+    // Same trail as any other task: an audit entry (by no user - the
+    // template made it) and TaskCreated for calendar and webhooks.
+    const audit = await prisma.auditLog.findMany({
+      where: { entityType: 'Task', entityId: generatedTask.id },
+    });
+    expect(audit).toEqual([
+      expect.objectContaining({ action: 'CREATE', userId: null }),
+    ]);
+    const events = await prisma.domainEvent.findMany({
+      where: { aggregateType: 'Task', aggregateId: generatedTask.id },
+    });
+    expect(events).toEqual([
+      expect.objectContaining({
+        type: 'TaskCreated',
+        actorUserId: null,
+        payload: {
+          relatedType: 'GENERAL',
+          relatedId: null,
+          dueDate: generatedTask.dueDate?.toISOString().slice(0, 10),
+        },
+      }),
+    ]);
+  });
+
+  it('creates nothing more for an occurrence already generated', async () => {
+    await request(app.getHttpServer())
+      .get('/api/v1/tasks')
+      .set('Authorization', `Bearer ${beekeeperToken}`)
+      .expect(200);
+
+    await expect(
+      prisma.task.count({ where: { sourceTemplateId: templateId } }),
+    ).resolves.toBe(1);
   });
 
   it('rejects a recurrence emptied of a field it needs', () => {