feat: refactor stage to multiple route design

server/src/models/quest.js

@@ -15,6 +15,12 @@ const stageSchema = new Schema({
     type: String,
     required: true,
   },
+  requirements: [
+    {
+      type: String,
+      required: true,
+    },
+  ],
   condition: {
     command: {
       type: [String],

server/src/models/session.js

@@ -39,8 +39,7 @@ const Session = model(
         default: Date.now,
         required: true,
       },
-      progress: String,
-      completion: [String],
+      completed: [String],
       hints: [String],
       graph: {
         type: nodeSchema,