Description
This PR fixes the session service logic by adding a check for unsupported database platforms. If a developer attempts to use DatabaseHandler with an unsupported driver (e.g., SQLSRV, OCI8, SQLite3), an InvalidArgumentException will now be thrown with a clear error message.

Problem spotted here: #9572

Checklist:

• Securely signed commits
• Component(s) with PHPDoc blocks, only if necessary or adds value
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide