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/prisma/migrations/20260822202209_equipment/migration.sql

@@ -0,0 +1,24 @@
+-- CreateEnum
+CREATE TYPE "EquipmentCondition" AS ENUM ('NEW', 'GOOD', 'WORN', 'DEFECTIVE');
+
+-- CreateTable
+CREATE TABLE "Equipment" (
+    "id" TEXT NOT NULL,
+    "inventoryNumber" TEXT NOT NULL,
+    "name" TEXT NOT NULL,
+    "manufacturer" TEXT,
+    "purchaseDate" TIMESTAMP(3),
+    "condition" "EquipmentCondition" NOT NULL DEFAULT 'GOOD',
+    "location" TEXT,
+    "maintenanceDate" TIMESTAMP(3),
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "Equipment_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "Equipment_inventoryNumber_key" ON "Equipment"("inventoryNumber");
+
+-- CreateIndex
+CREATE INDEX "Equipment_condition_idx" ON "Equipment"("condition");

ApiCore-Backend/prisma/schema.prisma

@@ -672,3 +672,29 @@ model BottlingBatch {
   @@index([honeyBatchId])
   @@index([productId])
 }
+
+// ---------------------------------------------------------------------------
+// Inventar (Abschnitt 4.22) – v1.x Modul 24
+// ---------------------------------------------------------------------------
+
+enum EquipmentCondition {
+  NEW
+  GOOD
+  WORN
+  DEFECTIVE
+}
+
+model Equipment {
+  id              String             @id @default(cuid())
+  inventoryNumber String             @unique
+  name            String
+  manufacturer    String?
+  purchaseDate    DateTime?
+  condition       EquipmentCondition @default(GOOD)
+  location        String?
+  maintenanceDate DateTime?
+  createdAt       DateTime           @default(now())
+  updatedAt       DateTime           @updatedAt
+
+  @@index([condition])
+}