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/backup/backup.module.ts

@@ -1,6 +1,7 @@
 import { Module } from '@nestjs/common';
 import { MulterModule } from '@nestjs/platform-express';
 import { ReauthModule } from '../auth/reauth/reauth.module';
+import { SystemModule } from '../system/system.module';
 import { BackupController } from './backup.controller';
 import { BackupService } from './backup.service';
 import { BackupSchedulerService } from './backup-scheduler.service';
@@ -10,6 +11,8 @@ import { backupMaxImportBytes } from './backup-import-limit';
 @Module({
   imports: [
     ReauthModule,
+    // JobRunService: GET /backup/schedule shows the newest app-backup run.
+    SystemModule,
     // Upload limit of POST /backup/import. A factory rather than a constant
     // in the decorator: it runs once the app starts, after ConfigModule has
     // loaded .env, so the limit is the same one exports are checked against.
@@ -19,5 +22,7 @@ import { backupMaxImportBytes } from './backup-import-limit';
   ],
   controllers: [BackupController],
   providers: [BackupService, BackupSchedulerService, BackupSettingsService],
+  // For the app-backup job (JobsModule, dist/cli.js).
+  exports: [BackupSchedulerService],
 })
 export class BackupModule {}