feat: add saldo balance tracking and item notes support for orders and reports

prisma/schema.prisma

@@ -55,6 +55,7 @@ model Submission {
   created_at     DateTime         @default(now())
   updated_at     DateTime         @updatedAt
   paid_amount    Int?
+  saldo_used     Int              @default(0)
   order          Order            @relation(fields: [order_id], references: [id], onDelete: Cascade)
   user           User             @relation(fields: [user_id], references: [id], onDelete: Cascade)
   items          SubmissionItem[]
@@ -64,6 +65,7 @@ model SubmissionItem {
   id            String     @id @default(uuid())
   submission_id String
   name          String
+  note          String?
   qty           Int        @default(1)
   is_custom     Boolean    @default(false)
   created_at    DateTime   @default(now())