sku builder first test

server/prisma/schema.prisma

@@ -138,6 +138,9 @@ model FileAttachment {
 model InventoryItem {
   id            String   @id @default(cuid())
   sku           String   @unique
+  skuFamilyId   String?
+  skuNodeId     String?
+  skuSequenceNumber Int?
   name          String
   description   String
   type          String
@@ -163,8 +166,48 @@ model InventoryItem {
   reservations InventoryReservation[]
   transfers InventoryTransfer[]
   preferredVendor Vendor? @relation(fields: [preferredVendorId], references: [id], onDelete: SetNull)
+  skuFamily     InventorySkuFamily? @relation(fields: [skuFamilyId], references: [id], onDelete: SetNull)
+  skuNode       InventorySkuNode? @relation(fields: [skuNodeId], references: [id], onDelete: SetNull)
 
   @@index([preferredVendorId])
+  @@index([skuFamilyId])
+  @@index([skuNodeId])
+}
+
+model InventorySkuFamily {
+  id            String   @id @default(cuid())
+  code          String   @unique
+  sequenceCode  String   @unique
+  name          String
+  description   String
+  nextSequenceNumber Int @default(1)
+  isActive      Boolean  @default(true)
+  createdAt     DateTime @default(now())
+  updatedAt     DateTime @updatedAt
+  nodes         InventorySkuNode[]
+  items         InventoryItem[]
+}
+
+model InventorySkuNode {
+  id            String   @id @default(cuid())
+  familyId      String
+  parentNodeId  String?
+  code          String
+  label         String
+  description   String
+  path          String
+  level         Int
+  sortOrder     Int      @default(0)
+  isActive      Boolean  @default(true)
+  createdAt     DateTime @default(now())
+  updatedAt     DateTime @updatedAt
+  family        InventorySkuFamily @relation(fields: [familyId], references: [id], onDelete: Cascade)
+  parentNode    InventorySkuNode? @relation("InventorySkuNodeTree", fields: [parentNodeId], references: [id], onDelete: Cascade)
+  childNodes    InventorySkuNode[] @relation("InventorySkuNodeTree")
+  items         InventoryItem[]
+
+  @@unique([familyId, path])
+  @@index([familyId, parentNodeId, sortOrder])
 }
 
 model Warehouse {