feature: onboarding emails

* wip

* wip

* wip

* fix coderabbit comments

* remove template

packages/db/prisma/schema.prisma

@@ -62,6 +62,7 @@ model Organization {
   integrations    Integration[]
   invites         Invite[]
   timezone        String?
+  onboarding      String?          @default("completed")
 
   // Subscription
   subscriptionId                          String?
@@ -610,3 +611,13 @@ model InsightEvent {
   @@index([insightId, createdAt])
   @@map("insight_events")
 }
+
+model EmailUnsubscribe {
+  id        String   @id @default(dbgenerated("gen_random_uuid()")) @db.Uuid
+  email     String
+  category  String
+  createdAt DateTime @default(now())
+
+  @@unique([email, category])
+  @@map("email_unsubscribes")
+}