Catch 502 bad gateway error during archiving

[e-belfer]

Zenodo occasionally spits back a 502 "Bad Gateway" error during runs. This results in uploaded files that don't contain the entirety of the data - see e.g., lines 98-114 in this run, which result in a very shrunken file. Sometimes these trip our file validation test, and sometimes they don't.

Theoretically we catch and retry with all errors, but this doesn't seem to be working as expected for the 502s.

We should:

• catch this error
• completely retry the file upload to prevent missing chunks