View the number of retries attempted to connect to GraceDB

Sentry isssue

relevant code

Being able to view the number of times the connection was retried in sentry would be helpful for diagnosing the point of failure for this issue and others

assigned to @cody.messick

I think that more generally we would like to see in Sentry the number of retries associated with a failed task, and whether the retries were ultimately successful. Not just for GraceDB, but for all tasks.