feat: implement invite onboarding and dynamic ticket fields

web/prisma/schema.prisma

@@ -231,6 +231,43 @@ model AuthAccount {
   @@index([userId])
 }
 
+model AuthInvite {
+  id           String   @id @default(cuid())
+  email        String
+  name         String?
+  role         String   @default("agent")
+  tenantId     String
+  token        String   @unique
+  status       String   @default("pending")
+  expiresAt    DateTime
+  createdAt    DateTime @default(now())
+  updatedAt    DateTime @updatedAt
+  createdById  String?
+  acceptedAt   DateTime?
+  acceptedById String?
+  revokedAt    DateTime?
+  revokedById  String?
+  revokedReason String?
+
+  events       AuthInviteEvent[]
+
+  @@index([tenantId, status])
+  @@index([tenantId, email])
+}
+
+model AuthInviteEvent {
+  id        String   @id @default(cuid())
+  inviteId  String
+  type      String
+  payload   Json?
+  actorId   String?
+  createdAt DateTime @default(now())
+
+  invite AuthInvite @relation(fields: [inviteId], references: [id], onDelete: Cascade)
+
+  @@index([inviteId, createdAt])
+}
+
 model AuthVerification {
   id         String   @id @default(cuid())
   identifier String