Fix DB table donasi:

- Relasi ke master bank dengan nilai default NULL

### No issue

prisma/migrations/20251217063947_fix_master_bank_fk_on_donasi_invoice/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "Donasi_Invoice" ALTER COLUMN "masterBankId" DROP DEFAULT;

prisma/schema.prisma

@@ -587,7 +587,7 @@ model Donasi_Invoice {
 
   imageId      String?
   MasterBank   MasterBank? @relation(fields: [masterBankId], references: [id])
-  masterBankId String?     @default("null")
+  masterBankId String?     
 }
 
 model Donasi_Kabar {