feat(backend): Suche und Filter (Modul 14)

SearchModule mit GET /search?q= über Bienenstände, Völker,
Königinnen, Aufgaben und Honigchargen. Kombinierbare Filter
(Status, Standort, Bienenstand) in den bestehenden List-Endpunkten.

ApiCore-Backend/src/honey-batches/honey-batches.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 { HoneyBatchStatus } from '../../generated/prisma';
 import { CreateHoneyBatchDto } from './dto/create-honey-batch.dto';
 import { CreateHoneyMeasurementDto } from './dto/create-honey-measurement.dto';
 
@@ -17,6 +18,10 @@ const honeyBatchInclude = {
   },
 } as const;
 
+export interface HoneyBatchFilter {
+  status?: HoneyBatchStatus;
+}
+
 @Injectable()
 export class HoneyBatchesService {
   constructor(
@@ -24,8 +29,9 @@ export class HoneyBatchesService {
     private readonly auditLog: AuditLogService,
   ) {}
 
-  async findAll() {
+  async findAll(filter: HoneyBatchFilter = {}) {
     return this.prisma.honeyBatch.findMany({
+      where: { status: filter.status },
       include: honeyBatchInclude,
       orderBy: { createdAt: 'desc' },
     });