fix: fix TestScheduleRetention

[salonig23]

Description

Test-go was failing on main because of TestScheduleRetention. Split it into 3 parts to avoid timing out

Test Plan

Commentary (optional)

Checklist

• Changes have been manually QA'd
• User-facing API changes need the "User-facing API Change" label.
• Release notes should be added as a separate file under docs/release-notes/.
  See Release Note for details.
• Licenses should be included for new code which was copied and/or modified from any external code.

Ticket

[netlify]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 47.17%. Comparing base (85bb3c8) to head (c8c3214).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9069      +/-   ##
==========================================
- Coverage   47.18%   47.17%   -0.01%     
==========================================
  Files        1152     1152              
  Lines      141773   141773              
  Branches     2417     2417              
==========================================
- Hits        66890    66885       -5     
- Misses      74693    74698       +5     
  Partials      190      190              

Flag	Coverage Δ
backend	43.00% <ø> (-0.02%)	⬇️
harness	64.31% <ø> (ø)
web	38.96% <ø> (ø)

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see 5 files with indirect coverage changes