load age on restricted user

**Describe the bug**
I Have deployed in an K8 cluster and it has configured age to preload as shared library. The main goal is, that I can create multiple users with restricted permissions.

This line https://github.com/apache/age-viewer/blob/8a7f0be2513e2aa4b2caf3d9833f4e2707f0001d/backend/src/tools/AGEParser.js#L41 creates the issue, because my user must be a superuser if age is pre-loaded

**Expected behavior**

Loading age library should be configurable if has got automatically loaded extensions.