Telegram: improve error message

Hi! I generally bulk scan physical invoices and add them altogether to the Telegram channel to be processed.

When Tailride can’t read an invoice (or extract details) the error message is simply: “ ❌ This doesn't appear to be a receipt or invoice. Please send a clear photo of a receipt or invoice document. Photos of other items cannot be processed.”

This message would be more helpful if it was followed by the filename that couldn’t be processed.