fix(workshop): harden deployment and deep links (#6542)

apps/workshop/tests/oauth-sync.integration.mjs

@@ -23,5 +23,12 @@ const github = users.oauth2?.providers?.find((provider) => provider.name === "gi
 if (!users.oauth2?.enabled || github?.clientId !== expectedClientId) {
   throw new Error(`GitHub OAuth was not synchronized for ${expectedClientId}`);
 }
+if (
+  users.oauth2?.mappedFields?.username !== "displayName" ||
+  users.oauth2?.mappedFields?.name ||
+  users.oauth2?.mappedFields?.avatarURL !== "avatarUrl"
+) {
+  throw new Error(`GitHub OAuth field mapping was not synchronized: ${JSON.stringify(users.oauth2?.mappedFields)}`);
+}
 
 console.log(`Workshop OAuth synchronization passed for ${expectedClientId}`);