do not early return for validated task in synchronous mode

[codchen]

Describe your changes and provide context

Early returning without re-execution may leave invalid state

Testing performed to validate your change

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 54.89%. Comparing base (851b25b) to head (c643b52).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #547      +/-   ##
==========================================
- Coverage   54.89%   54.89%   -0.01%     
==========================================
  Files         631      631              
  Lines       54955    54954       -1     
==========================================
- Hits        30167    30165       -2     
- Misses      22630    22631       +1     
  Partials     2158     2158              

Files with missing lines	Coverage Δ
tasks/scheduler.go	90.81% <100.00%> (-0.03%)	⬇️

... and 1 file with indirect coverage changes