feat(backend): Abfuellungen und Produkte (Modul 23)

ProductsModule (GET/POST /products, GET/PATCH /products/:id) und
BottlingModule (GET/POST /bottling-batches) mit transaktionaler
Reduzierung der HoneyBatch-Restmenge beim Abfuellen; Ablehnung bei
Abfuellmenge > verfuegbarer Menge. Neue Prisma-Modelle Product und
BottlingBatch (Migration bottling_products).

ApiCore-Backend/src/bottling/dto/create-bottling-batch.dto.ts

@@ -0,0 +1,42 @@
+import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
+import {
+  IsDateString,
+  IsInt,
+  IsNumber,
+  IsOptional,
+  IsPositive,
+  IsString,
+} from 'class-validator';
+
+export class CreateBottlingBatchDto {
+  @ApiProperty()
+  @IsString()
+  honeyBatchId!: string;
+
+  @ApiPropertyOptional()
+  @IsOptional()
+  @IsString()
+  productId?: string;
+
+  @ApiProperty()
+  @IsDateString()
+  date!: string;
+
+  @ApiProperty({ description: 'Glasgröße in Gramm' })
+  @IsNumber()
+  @IsPositive()
+  jarSize!: number;
+
+  @ApiProperty()
+  @IsInt()
+  @IsPositive()
+  jarCount!: number;
+
+  @ApiProperty()
+  @IsDateString()
+  bestBeforeDate!: string;
+
+  @ApiProperty()
+  @IsString()
+  lotNumber!: string;
+}