feat: default response to dialogue and spoken by Ada

packages/models/quest.js

@@ -3,10 +3,12 @@ import { model, Schema } from 'mongoose'
 const responseSchema = new Schema({
   type: {
     type: String,
+    enum: ['narrative', 'dialogue'],
+    default: 'dialogue',
     required: true,
   },
   content: [String],
-  speaker: String,
+  speaker: { type: String, default: 'Ada' },
   color: String,
 })