[loader] Assign an appropriate tag to each type of error

[iamluc]

Description

Reviewer checklist

• Test coverage seems ok.
• Appropriate labels assigned.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 51.72%. Comparing base (34baa56) to head (1858e85).
Report is 3 commits behind head on master.

❗ There is a different number of reports uploaded between BASE (34baa56) and HEAD (1858e85). Click for more details.

HEAD has 2 uploads less than BASE

Flag	BASE (34baa56)	HEAD (1858e85)
tracer-php	11	10
appsec-extension	1	0

Additional details and impacted files

@@              Coverage Diff              @@
##             master    #2985       +/-   ##
=============================================
- Coverage     73.12%   51.72%   -21.40%     
  Complexity     2741     2741               
=============================================
  Files           137      110       -27     
  Lines         14907    10863     -4044     
  Branches        992        0      -992     
=============================================
- Hits          10900     5619     -5281     
- Misses         3462     5244     +1782     
+ Partials        545        0      -545     

Flag	Coverage Δ
appsec-extension	?
tracer-php	51.72% <ø> (-23.10%)	⬇️

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see 48 files with indirect coverage changes

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[realFlowControl]

Looks good to me, apart from one nitpick.