Hotfix B — Cover EXIF Orientation preservation

[maruson08]

Add Secure Tools integration regression coverage for JPEG EXIF Orientation=6. Confirm Orientation survives Privacy Clean, privacy-related EXIF/GPS is removed, verification passes, and scan payload bytes are unchanged.

[maruson08]

Completed in #58. Orientation 3, 6, and 8 preservation, privacy EXIF/GPS removal, verification, and unchanged JPEG scan bytes are covered.