refactor: ( iam ) remove user relations

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

@@ -260,8 +260,6 @@ model User {
   faydaVerifiedAt DateTime?
   faydaSub        String?   @unique
 
-  passenger    Passenger?
-  agent        Agent?
   sessions     Session[]
 
   @@schema("passenger")
@@ -288,7 +286,6 @@ model Passenger {
   preferredLanguage String?
   blockedUntil DateTime?
   createdAt DateTime @default(now())
-  user             User?             @relation(fields: [userId], references: [id])
   bookings         Booking[]
   loyalty          LoyaltyAccount?
   wallet           WalletAccount?
@@ -1057,16 +1054,16 @@ model SegmentFareRule {
 
 model Agent {
   id             String            @id @default(uuid())
-  userId         String            @unique
+  iamUserId      String?           @unique
   agentCode      String            @unique
   stationId      String?
   commissionRate Int               @default(5)
   active         Boolean           @default(true)
   createdAt      DateTime          @default(now())
-  user           User              @relation(fields: [userId], references: [id])
   bookings       AgentBooking[]
   shifts         AgentShift[]
   commissions    AgentCommission[]
+  @@index([iamUserId])
   @@schema("passenger")
 }