IRIS PDF FINAL

Upload ZIP in public_html and Extract to /public_html.
Allow Replace/Overwrite for included admin PHP files.
No SQL change is required for this PDF patch.

Iris PDF button is added to Mobile, Biometric, DOB, Name and Demographic pending lists (admin/operator and retailer pending list pages).
PDF page reads iris1..iris5 first and falls back to finger1..finger5 for compatibility.
Layout: 3 iris images on first row, 2 on second row.
