Fixing the issue with complete deletion from the database

apps/api/prisma/schema.prisma

@@ -209,6 +209,7 @@ model Organization {
   leadImportJobs         LeadImportJob[]
   conversationSettings   ConversationSettings?
   conversationRooms      ConversationRoom[]
+  conversationHiddenMessages ConversationHiddenMessage[]
 }
 
 model User {
@@ -2095,3 +2096,17 @@ model ConversationRoom {
   @@unique([organizationId, dmUserMinId, dmUserMaxId])
   @@index([organizationId, kind])
 }
+
+/// پیام‌های حذف‌شده برای همه در CRM (سرویس چت خارجی حذف پایدار ندارد)
+model ConversationHiddenMessage {
+  id             String       @id @default(cuid())
+  organizationId String
+  organization   Organization @relation(fields: [organizationId], references: [id], onDelete: Cascade)
+  externalRoomId String
+  messageId      String
+  hiddenByUserId String
+  createdAt      DateTime     @default(now())
+
+  @@unique([organizationId, externalRoomId, messageId])
+  @@index([organizationId, externalRoomId])
+}