v0.2.2

Verified encrypted PDF trailers now raise EncryptedPdfException, which remains compatible with UnsupportedPdfFeature handlers. Applications can route authentication by the exception type without matching words in diagnostic messages.

Validation: 291 PHPUnit tests, PHPStan and PSR-12; exact candidate CI on PHP 8.3, 8.4 and 8.5, including independent pypdf/qpdf PDF fixtures. English and French security documentation is updated.