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/src/varroa/dto/bulk-create-varroa-measurement.dto.spec.ts

@@ -0,0 +1,72 @@
+import { plainToInstance } from 'class-transformer';
+import { validate, ValidationError } from 'class-validator';
+import { BulkCreateVarroaMeasurementDto } from './bulk-create-varroa-measurement.dto';
+
+// Every constraint message, nested entries included.
+function messagesOf(errors: ValidationError[]): string[] {
+  return errors.flatMap((error) => [
+    ...Object.values(error.constraints ?? {}),
+    ...messagesOf(error.children ?? []),
+  ]);
+}
+
+async function check(body: Record<string, unknown>): Promise<string[]> {
+  const dto = plainToInstance(BulkCreateVarroaMeasurementDto, body);
+  return messagesOf(
+    await validate(dto, { whitelist: true, forbidNonWhitelisted: true }),
+  );
+}
+
+const shared = {
+  date: '2026-09-10',
+  method: 'NATURAL_MITE_FALL',
+  durationMinutes: 4320,
+};
+
+describe('BulkCreateVarroaMeasurementDto', () => {
+  it('accepts one entry per colony with its own mite count', async () => {
+    await expect(
+      check({
+        ...shared,
+        entries: [
+          { colonyId: 'colony-1', miteCount: 30, assessment: 'hoch' },
+          { colonyId: 'colony-2', miteCount: 6 },
+        ],
+      }),
+    ).resolves.toEqual([]);
+  });
+
+  it('rejects an empty colonyId in an entry with the message of the colonyIds path', async () => {
+    await expect(
+      check({ ...shared, entries: [{ colonyId: '', miteCount: 3 }] }),
+    ).resolves.toEqual(['colonyId enthält eine leere Volk-ID']);
+  });
+
+  it('rejects a colonyId that is no text', async () => {
+    await expect(
+      check({ ...shared, entries: [{ colonyId: 7, miteCount: 3 }] }),
+    ).resolves.toContain('colonyId enthält eine ungültige Volk-ID');
+  });
+
+  it('rejects a colony that appears twice', async () => {
+    await expect(
+      check({
+        ...shared,
+        entries: [
+          { colonyId: 'colony-1', miteCount: 3 },
+          { colonyId: 'colony-1', miteCount: 4 },
+        ],
+      }),
+    ).resolves.toEqual(['entries enthält ein Volk doppelt']);
+  });
+
+  it('rejects a shared mite count', async () => {
+    const messages = await check({
+      ...shared,
+      miteCount: 5,
+      entries: [{ colonyId: 'colony-1' }],
+    });
+
+    expect(messages).toEqual(['property miteCount should not exist']);
+  });
+});

ApiCore-Backend/src/varroa/dto/bulk-create-varroa-measurement.dto.ts

@@ -0,0 +1,35 @@
+import { OmitType, PickType } from '@nestjs/swagger';
+import {
+  IsBulkEntries,
+  IsBulkEntryColonyId,
+} from '../../common/bulk/bulk-validation';
+import { CreateVarroaMeasurementDto } from './create-varroa-measurement.dto';
+
+const OWN_READINGS = ['miteCount', 'calculatedValue', 'assessment'] as const;
+
+/**
+ * What each colony has of its own in a bulk count: its mites and their
+ * reading, validated exactly as on a single measurement. The colony id
+ * follows the bulk rule (non-empty, as in colonyIds).
+ */
+export class BulkVarroaEntryDto extends PickType(
+  CreateVarroaMeasurementDto,
+  OWN_READINGS,
+) {
+  @IsBulkEntryColonyId()
+  colonyId!: string;
+}
+
+/**
+ * One varroa count for several colonies: date, method, duration and notes
+ * are shared, every colony brings its own mite count in `entries` - there is
+ * no shared mite count. calculatedValue is derived per entry as for a single
+ * measurement unless the entry carries one.
+ */
+export class BulkCreateVarroaMeasurementDto extends OmitType(
+  CreateVarroaMeasurementDto,
+  ['colonyId', ...OWN_READINGS] as const,
+) {
+  @IsBulkEntries(BulkVarroaEntryDto)
+  entries!: BulkVarroaEntryDto[];
+}