Risky global $SESSION usage

[volodymyrdovhan]

Hello,
Plugin stores data in $_SESSION instead of using Moodle's Cache API with MODE_SESSION for better security and scalability.

Documentation:

• https://moodledev.io/docs/5.0/apis/subsystems/muc

Code excerpts:

• File: lib.php

53:     // Use session cache to avoid DB query on every page load.
54:     // Cache is invalidated when the user visits the profile edit page.
55:     if (!empty($SESSION->local_forceprofile_complete)) {
56:         return;
57:     }