ci: run psalm from vendor dir

[simPod]

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[codecov]

Codecov Report

Merging #40 (31488fd) into master (57b4545) will increase coverage by 0.54%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master      #40      +/-   ##
============================================
+ Coverage     79.22%   79.76%   +0.54%     
  Complexity       55       55              
============================================
  Files             8        8              
  Lines           154      173      +19     
============================================
+ Hits            122      138      +16     
- Misses           32       35       +3     

Impacted Files	Coverage Δ
src/Clients/Consumer/WithSignalControl.php	86.66% <0.00%> (-6.20%)	⬇️
src/Clients/Producer/KafkaProducer.php	83.33% <0.00%> (+0.72%)	⬆️
src/Clients/Consumer/KafkaConsumer.php	69.14% <0.00%> (+4.21%)	⬆️

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