feat: sync calendar entries to a Microsoft 365 group calendar

Adds a one-way push (ApiCore -> M365) of Aufgaben/Durchsichten/
Behandlungen/Fütterungen/Ernten/Königinnen-Zuordnungen into the calendar
of a Microsoft 365 group, via the Graph API.

- CalendarSyncModule (app-only client-credentials Graph auth, separate
  from the interactive SSO app registration; new env vars
  M365_CALENDAR_TENANT_ID/_CLIENT_ID/_CLIENT_SECRET).
- Outbox + minute-interval cron worker (CalendarSyncOutboxEntry) instead
  of a synchronous push, since Graph calls are too slow/flaky to block a
  domain create request on; failed syncs retry up to 5 times.
- Per-source-type toggle plus a group-ID field, configurable in
  Verwaltung > Automatisierung > Kalender-Sync (Verwaltung > Backup, an
  env var still wins on those fields where one applies to related config).
- Hooked into Tasks/Inspections/Treatments/Feedings/Harvests/Queens at
  their existing create (and Task update/complete) points; entries render
  as all-day Graph events to avoid timezone ambiguity.
- Documents the design decision in ARCHITECTURE.md (Annahme 9), since
  this is a net-new capability the lastenheft doesn't scope.

Co-Authored-By: Claude Sonnet 5 <[email protected]>

ApiCore-Backend/src/feedings/feedings.service.spec.ts

@@ -2,6 +2,7 @@ import { NotFoundException } from '@nestjs/common';
 import { FeedingsService } from './feedings.service';
 import { PrismaService } from '../prisma/prisma.service';
 import { AuditLogService } from '../audit/audit-log.service';
+import { CalendarSyncService } from '../calendar-sync/calendar-sync.service';
 
 describe('FeedingsService', () => {
   let service: FeedingsService;
@@ -29,9 +30,11 @@ describe('FeedingsService', () => {
       },
     };
     auditLog = { record: jest.fn() };
+    const calendarSync = { enqueue: jest.fn(), cancel: jest.fn() };
     service = new FeedingsService(
       prisma as unknown as PrismaService,
       auditLog as unknown as AuditLogService,
+      calendarSync as unknown as CalendarSyncService,
     );
   });
 

ApiCore-Backend/src/feedings/feedings.service.ts

@@ -1,6 +1,7 @@
 import { Injectable, NotFoundException } from '@nestjs/common';
 import { PrismaService } from '../prisma/prisma.service';
 import { AuditLogService } from '../audit/audit-log.service';
+import { CalendarSyncService } from '../calendar-sync/calendar-sync.service';
 import { Feeding } from '../../generated/prisma';
 import { CreateFeedingDto } from './dto/create-feeding.dto';
 import { UpdateFeedingDto } from './dto/update-feeding.dto';
@@ -15,6 +16,7 @@ export class FeedingsService {
   constructor(
     private readonly prisma: PrismaService,
     private readonly auditLog: AuditLogService,
+    private readonly calendarSync: CalendarSyncService,
   ) {}
 
   async findAll(): Promise<Feeding[]> {
@@ -59,6 +61,7 @@ export class FeedingsService {
       userId: actingUserId,
       afterData: feeding,
     });
+    await this.calendarSync.enqueue('FEEDING', feeding.id);
     return feeding;
   }