init codebase

api/resources/migrations/012-create-notifications.up.sql

@@ -0,0 +1,8 @@
+CREATE TABLE IF NOT EXISTS notifications (
+  id          uuid        PRIMARY KEY DEFAULT gen_random_uuid(),
+  user_id     uuid        NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+  type        text        NOT NULL CHECK (type IN ('mention', 'dm', 'thread_reply', 'invite', 'system')),
+  source_id   uuid,
+  read        boolean     DEFAULT false,
+  created_at  timestamptz DEFAULT now()
+);