v3: added a chatbox

api/db/schema.sql

@@ -192,3 +192,13 @@ CREATE INDEX idx_notifications_user ON notifications(user_id, created_at);
 CREATE UNIQUE INDEX idx_notifications_dedup
   ON notifications(user_id, source_key)
   WHERE source_key IS NOT NULL;
+
+CREATE TABLE chat_messages (
+  id         TEXT NOT NULL PRIMARY KEY,
+  user_id    TEXT NOT NULL,
+  body       TEXT NOT NULL,
+  created_at TEXT NOT NULL,
+  updated_at TEXT,
+  FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+);
+CREATE INDEX idx_chat_messages_created ON chat_messages(created_at);