Include task representation Dramatiq log messages

[ccurvey]

by making RetryError inherit from dramatiq.errors.Retry, we can avoid having Dramatiq log a stack trace every time a task returns False. (see Bogdanp/dramatiq#469)

I also changed a few of the log message so that we know which task returned False or completed successfully.

[codingjoe]

Hi @ccurvey,

Thanks for the contribution. Always appreciated.

I left you a couple of small suggestions. Moreover, please take a look at the CI results.

Cheers!
Joe

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (7b0b990) 97.86% compared to head (285a969) 97.86%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #78   +/-   ##
=======================================
  Coverage   97.86%   97.86%           
=======================================
  Files          17       17           
  Lines         701      701           
=======================================
  Hits          686      686           
  Misses         15       15           

Impacted Files	Coverage Δ
joeflow/runner/dramatiq.py	97.43% <100.00%> (ø)

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.