fix: update SupplierLedger model to use correct enum casing and adjust types

feat: enhance PosAccountsService to include inventoryBankAccount details in responses

refactor: modify PosService to return structured inventory and bank account data

chore: remove isSettled field from CreatePurchaseReceiptDto and adjust related logic

feat: add payments selection in SuppliersService for better payment tracking

chore: apply database migrations to adjust decimal types and enforce constraints

chore: create index on Pos_Accounts for improved query performance

feat: define Supplier and SupplierLedger models in Prisma schema for better data management

prisma/schema/supplier.prisma

@@ -0,0 +1,37 @@
+model Supplier {
+  id             Int               @id @default(autoincrement())
+  firstName      String            @db.VarChar(255)
+  lastName       String            @db.VarChar(255)
+  email          String?           @db.VarChar(255)
+  mobileNumber   String            @unique @db.Char(11)
+  address        String?           @db.Text
+  city           String?           @db.VarChar(100)
+  state          String?           @db.VarChar(100)
+  country        String?           @db.VarChar(100)
+  isActive       Boolean           @default(true)
+  createdAt      DateTime          @default(now()) @db.Timestamp(0)
+  updatedAt      DateTime          @updatedAt @db.Timestamp(0)
+  deletedAt      DateTime?         @db.Timestamp(0)
+  stockMovements StockMovement[]   @relation("StockMovement_Supplier")
+  receipts       PurchaseReceipt[]
+  ledger         SupplierLedger[]
+
+  @@map("Suppliers")
+}
+
+model SupplierLedger {
+  id          Int              @id @default(autoincrement())
+  description String?          @db.Text
+  debit       Decimal          @default(0) @db.Decimal(15, 2)
+  credit      Decimal          @default(0) @db.Decimal(15, 2)
+  balance     Decimal          @db.Decimal(15, 2)
+  sourceType  LedgerSourceType
+  sourceId    Int
+  createdAt   DateTime         @default(now()) @db.Timestamp(0)
+
+  supplierId Int
+  supplier   Supplier @relation(fields: [supplierId], references: [id])
+
+  @@index([supplierId])
+  @@map("Supplier_Ledger")
+}