config: add model relation

prisma/schema.prisma

@@ -100,6 +100,7 @@ model Product {
 model Review {
   id              Int       @id @default(autoincrement())
   productId       Int
+  modelId         Int
   content         String
   keywords        String[]
   sentiment       Sentiment
@@ -108,6 +109,7 @@ model Review {
   updatedAt       DateTime  @updatedAt
 
   product  Product    @relation(fields: [productId], references: [id])
+  model    Model      @relation(fields: [modelId], references: [id])
   analysis Analysis[]
 }
 
@@ -123,4 +125,5 @@ model Model {
   updatedAt   DateTime @updatedAt
 
   analysis Analysis[]
+  review Review[]
 }