add PhotoInfo.imported_by

[RhetTbull]

See here for meaning of PhotoInfo.tables().ZADDITIONALASSETATTRIBUTE.ZIMPORTEDBY[0]

CASE zAddAssetAttr.ZIMPORTEDBY
    WHEN 0 THEN '0-Cloud-Other-0'
    WHEN 1 THEN '1-Native-Back-Camera-1'
    WHEN 2 THEN '2-Native-Front-Camera-2'
    WHEN 3 THEN '3-Third-Party-App-3'
    WHEN 4 THEN '4-StillTesting-4'
    WHEN 5 THEN '5-PhotoBooth_PL-Asset-5'
    WHEN 6 THEN '6-Third-Party-App-6'
    WHEN 7 THEN '7-iCloud_Share_Link-CMMAsset-7'
    WHEN 8 THEN '8-System-Package-App-8'
    WHEN 9 THEN '9-Native-App-9'
    WHEN 10 THEN '10-StillTesting-10'
    WHEN 11 THEN '11-StillTesting-11'
    WHEN 12 THEN '12-SWY_Syndication_PL-12'

Maybe use an enum for the value? Would allow query on imported_by.