Only try once to add the view changes since link

[Urgau]

Only try to add the view changes since link once to avoid retrying multiple times for comments that may have been deleted, or review comments we can't modify, ...

[Kobzol]

Were the jobs repeated many times? 🥶 Good catch!

View changes since this review

[Urgau]

Were the jobs repeated many times?

I don't know, I think they repeated indefinitely, but it's hard to tell.

triagebot/src/db/jobs.rs

Lines 95 to 97 in 8fe35ac

	// Selects all jobs with:
	// - scheduled_at in the past
	// - error_message is null or executed_at is at least 60 minutes ago (intended to make repeat executions rare enough)