feat(backend): Inventar (Modul 24)

EquipmentModule (GET/POST /equipment, GET/PATCH /equipment/:id) fuer
Ausruestungsgegenstaende (Inventarnummer, Bezeichnung, Hersteller,
Kaufdatum, Zustand, Standort, Wartungsdatum). Neues Prisma-Modell
Equipment (Migration equipment).

ApiCore-Backend/src/equipment/dto/create-equipment.dto.ts

@@ -0,0 +1,32 @@
+import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
+import { IsDateString, IsOptional, IsString } from 'class-validator';
+
+export class CreateEquipmentDto {
+  @ApiProperty()
+  @IsString()
+  inventoryNumber!: string;
+
+  @ApiProperty()
+  @IsString()
+  name!: string;
+
+  @ApiPropertyOptional()
+  @IsOptional()
+  @IsString()
+  manufacturer?: string;
+
+  @ApiPropertyOptional()
+  @IsOptional()
+  @IsDateString()
+  purchaseDate?: string;
+
+  @ApiPropertyOptional()
+  @IsOptional()
+  @IsString()
+  location?: string;
+
+  @ApiPropertyOptional()
+  @IsOptional()
+  @IsDateString()
+  maintenanceDate?: string;
+}