fix: speed up evaluation in proc-compose

[gabyx]

Proposed Changes

• speed up evaluation

Types of Changes

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• A bug fix (non-breaking change which fixes an issue). Use MR tag
  bugfix.
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• A non-productive update (documentation, tooling, etc. if none of the
  other choices apply). Use MR tag chore.

Checklist

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Further Comments

[codecov]

Codecov Report

Attention: Patch coverage is 80.55556% with 7 lines in your changes missing coverage. Please review.

Project coverage is 60.39%. Comparing base (00ad2f9) to head (5ca233e).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/exec/process-compose/compose.go	80.55%	5 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #23      +/-   ##
==========================================
+ Coverage   60.18%   60.39%   +0.21%     
==========================================
  Files          89       89              
  Lines        4697     4717      +20     
==========================================
+ Hits         2827     2849      +22     
+ Misses       1632     1631       -1     
+ Partials      238      237       -1     

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