Seats report, supplementary change for bookings added

apps/edr-passenger-api/prisma/schema.prisma

@@ -567,6 +567,7 @@ model Booking {
   cancellation              BookingCancellation?
   baggage                   BaggageBooking[]
   excessBaggageCharges      ExcessBaggageCharge[]
+  supplementaryCharges      SupplementaryCharge[]
   journey                   Journey?
 
   @@index([passengerId, status])
@@ -1234,6 +1235,28 @@ model BaggageBooking {
   @@schema("passenger")
 }
 
+model SupplementaryCharge {
+  id            String    @id @default(uuid())
+  bookingId     String
+  reason        String    // e.g. "UNDERPAYMENT", "FARE_CORRECTION"
+  amountMinor   Int
+  currency      String    @default("ETB")
+  status        String    @default("PENDING") // PENDING | PAID | WAIVED | EXPIRED
+  paymentToken  String    @unique @default(uuid())
+  providerTxnId String?
+  notes         String?
+  createdBy     String
+  paidAt        DateTime?
+  expiresAt     DateTime?
+  createdAt     DateTime  @default(now())
+  booking       Booking   @relation(fields: [bookingId], references: [id])
+
+  @@index([bookingId])
+  @@index([paymentToken])
+  @@index([status])
+  @@schema("passenger")
+}
+
 model ExcessBaggageCharge {
   id             String   @id @default(uuid())
   bookingId      String