Fix coverage by making sure isolated specs have SimpleCov.command_name

[sl0thentr0py]

also

• make sure only spec files are run by the :isolated_specs task (and not the helper ruby init file)
• upload coverage for all delayed_job runs

see https://github.com/simplecov-ruby/simplecov?tab=readme-ov-file#merging-results

#skip-changelog

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.43%. Comparing base (c509ce1) to head (13b6a3a).
Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #2629       +/-   ##
===========================================
+ Coverage   64.15%   97.43%   +33.28%     
===========================================
  Files         127      133        +6     
  Lines        4918     5114      +196     
===========================================
+ Hits         3155     4983     +1828     
+ Misses       1763      131     -1632     

Components	Coverage Δ
sentry-ruby	97.70% <ø> (+37.92%)	⬆️
sentry-rails	96.55% <ø> (+36.29%)	⬆️
sentry-sidekiq	96.57% <ø> (ø)
sentry-resque	94.44% <ø> (ø)
sentry-delayed_job	94.68% <ø> (-0.98%)	⬇️
sentry-opentelemetry	99.31% <ø> (ø)

see 102 files with indirect coverage changes

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[solnic]

🙇🏻