If transfers are disabled whilst there are send queues ready to go out, then we will create an infinite loop

[JBorrow]

librarian/librarian_background/queues.py

Line 261 in 657cff3

if librarian is None or not librarian.transfers_enabled:

This returns true, which fails the break statement below. I think the idea here was to 'move on to the next one' but we don't do that as we run the query inside the function and so there is no state.