GHSA-5QMH-X653-G8QJ FacturaScripts: Authenticated SQL injection in the FacturaScripts REST API filter parameter via parenthesis bypass in `Where::sqlColumn`

Summary Live PoC verified 2026-04-30 against a stock FacturaScripts master at 127.0.0.1:8081. A scoped ApiKey with fullaccess=0 and an ApiAccess row granting allowget=1 on the clientes resource only no other rights, no UI session, no admin issued one GET /api/3/clientes?filter0UNION%20SELECT%20.....