[deploy] add register module backend

src/database/schema.prisma

@@ -26,6 +26,8 @@ model GuildSettings {
   reactionRolesEnabled Boolean?
   reactionRolesConfig  Json?
   eventsEnabled   Boolean?
+  registerEnabled  Boolean?
+  registerConfig   Json?
   supportRoleId     String?
   updatedAt         DateTime @updatedAt
   createdAt         DateTime @default(now())
@@ -160,3 +162,54 @@ model EventSignup {
   @@unique([eventId, userId])
   @@index([guildId, eventId])
 }
+
+model RegisterForm {
+  id             String   @id @default(cuid())
+  guildId        String
+  name           String
+  description    String?
+  reviewChannelId String?
+  notifyRoleIds  String[]
+  isActive       Boolean  @default(true)
+  createdAt      DateTime @default(now())
+  updatedAt      DateTime @updatedAt
+  fields         RegisterFormField[]
+
+  @@index([guildId, isActive])
+}
+
+model RegisterFormField {
+  id        String   @id @default(cuid())
+  formId    String
+  label     String
+  type      String
+  required  Boolean  @default(false)
+  "order"   Int      @default(0)
+
+  form      RegisterForm @relation(fields: [formId], references: [id], onDelete: Cascade)
+}
+
+model RegisterApplication {
+  id         String   @id @default(cuid())
+  guildId    String
+  userId     String
+  formId     String
+  status     String   @default("pending")
+  reviewedBy String?
+  createdAt  DateTime @default(now())
+  updatedAt  DateTime @updatedAt
+  answers    RegisterApplicationAnswer[]
+
+  form       RegisterForm @relation(fields: [formId], references: [id])
+
+  @@index([guildId, formId, status])
+}
+
+model RegisterApplicationAnswer {
+  id             String   @id @default(cuid())
+  applicationId  String
+  fieldId        String
+  value          String
+
+  application    RegisterApplication @relation(fields: [applicationId], references: [id], onDelete: Cascade)
+}