[Feat] Sleep derived when there are no more watchers

[jinyus]

Description

Type of Change

• ✨ New feature (non-breaking change which adds functionality)
• 🛠️ Bug fix (non-breaking change which fixes an issue)
• ❌ Breaking change (fix or feature that would cause existing functionality to change)
• 🧹 Code refactor
• ✅ Build configuration change
• 📝 Documentation
• 🗑️ Chore

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (bde8f95) 100.00% compared to head (d8e60b7) 100.00%.
Report is 11 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #51   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           33        33           
  Lines          850       888   +38     
=========================================
+ Hits           850       888   +38     

Flag	Coverage Δ
unittests	100.00% <100.00%> (ø)

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