Updated seat class and coach mangement

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

@@ -35,10 +35,16 @@ enum SeatStatus {
   BLOCKED
 }
 
-enum ServiceClass {
-  ECONOMY
-  BUSINESS
-  FIRST
+model SeatClass {
+  id          String   @id @default(uuid())
+  name        String   @unique
+  description String?
+  basePrice   Int
+  isActive    Boolean  @default(true)
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+  coaches     Coach[]
+  fareRules   FareRule[]
 }
 
 enum BookingStatus {
@@ -249,12 +255,13 @@ model TripLiveStatus {
 }
 
 model Coach {
-  id           String       @id @default(uuid())
+  id           String    @id @default(uuid())
   tripId       String
   label        String
-  serviceClass ServiceClass
-  trip  Trip   @relation(fields: [tripId], references: [id])
-  seats Seat[]
+  seatClassId  String
+  trip      Trip      @relation(fields: [tripId], references: [id])
+  seatClass SeatClass @relation(fields: [seatClassId], references: [id])
+  seats     Seat[]
   @@unique([tripId, label])
 }
 
@@ -283,11 +290,12 @@ model SeatHold {
 }
 
 model FareRule {
-  id            String       @id @default(uuid())
+  id            String    @id @default(uuid())
   tripId        String?
   route         String?
-  serviceClass  ServiceClass
+  seatClassId   String
   baseFareMinor Int
+  seatClass SeatClass @relation(fields: [seatClassId], references: [id])
   currency      String       @default("ETB")
   refundable    Boolean      @default(true)
   validFrom     DateTime