New data sources + improve data dumps + website support

• Migrate DAMS source to NetX [WEB-1007
• Migrate shop source to Shopify [WEB-2004]
• Add on_loan_display to artworks [WEB-1910]
• Make artwork description a restricted field [WEB-1925]
• Make scheduled events never overlap [WEB-874]
• Limit uploads of data dumps to GitHub to 10 files per folder
• Upload a tarball of all API data to S3 [WEB-1832]
• Show image fingerprints in API [WEB-1916]
• Rename "Sustaining Fellows" to "Luminary" [WEB-1834]
• Add virtual event fields to events endpoint [WEB-1865]
• Update documentation