Is there a FOSS program where I can inventory my high value items in case there is an insurance claim?
I was thinking of the item, the picture of the item and serial number, maybe the UPC, and then an attachment of the receipt.
I’m guessing some kind of database that integrates file attachments per item.
Probably way too over engineered for your purpose, but Snipe IT is a very good inventory and asset management and tracking software, which is the term you are probably looking for.
Do yourself a favour and export everything to PDF regardless what you’re using and make backups with the 3-2-1 rule.