new table for settings and store blocked date there;

non admins can't enter avs before the blocked date
new table for survey

prisma/schema.prisma

@@ -264,6 +264,15 @@ enum MessageType {
   InApp
 }
 
+model Survey {
+  id          Int       @id @default(autoincrement())
+  content     String
+  answers     Json?
+  messages    Message[]
+  publicFrom  DateTime?
+  publicUntil DateTime?
+}
+
 model Message {
   id          Int         @id @default(autoincrement())
   publisher   Publisher   @relation(fields: [publisherId], references: [id])
@@ -274,6 +283,12 @@ model Message {
   isPublic    Boolean     @default(false)
   type        MessageType @default(Email)
   publicUntil DateTime?
+  shownDate   DateTime?
+  answer      String?
+  answerDate  DateTime?
+
+  Survey   Survey? @relation(fields: [surveyId], references: [id])
+  surveyId Int?
 }
 
 enum EventLogType {
@@ -348,3 +363,9 @@ model VerificationToken {
 
   @@unique([identifier, token])
 }
+
+model Settings {
+  key         String  @id
+  value       String
+  description String?
+}