Merge pull request #25145 from overleaf/jdt-wf-premium-src

Add premium source to Writefull entitlement sync

GitOrigin-RevId: bbebd7741efdf40a444768255b4aade857aca602

services/web/app/src/models/User.js

@@ -196,6 +196,7 @@ const UserSchema = new Schema(
       enabled: { type: Boolean, default: null },
       autoCreatedAccount: { type: Boolean, default: false },
       isPremium: { type: Boolean, default: false },
+      premiumSource: { type: String, default: null },
     },
     aiErrorAssistant: {
       enabled: { type: Boolean, default: true },