fix locking on ending execution

[withinboredom]

closes #2

[codecov]

Codecov Report

Patch coverage: 42.85% and project coverage change: +0.16 🎉

Comparison is base (b51d08a) 32.12% compared to head (f168a7c) 32.28%.

Additional details and impacted files

@@             Coverage Diff              @@
##               main       #8      +/-   ##
============================================
+ Coverage     32.12%   32.28%   +0.16%     
- Complexity      752      754       +2     
============================================
  Files            70       70              
  Lines          2310     2317       +7     
============================================
+ Hits            742      748       +6     
- Misses         1568     1569       +1     

Impacted Files	Coverage Δ
src/State/OrchestrationHistory.php	76.99% <33.33%> (-2.45%)	⬇️
src/OrchestrationContext.php	69.95% <100.00%> (+0.14%)	⬆️

... and 1 file with indirect coverage changes

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