Propagate task context

[alesr]

Allow callers to pass context to the task, and organize unit tests

[codecov]

Codecov Report

❌ Patch coverage is 87.50000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.01%. Comparing base (36156ae) to head (9118cfd).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
workerpool.go	87.50%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main       #3       +/-   ##
===========================================
- Coverage   96.07%   83.01%   -13.06%     
===========================================
  Files           1        1               
  Lines          51       53        +2     
===========================================
- Hits           49       44        -5     
- Misses          2        8        +6     
- Partials        0        1        +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.