wip: flaky tests fix + debug

[roperzh]

Checklist for submitter

If some of the following don't apply, delete the relevant line.

• Changes file added for user-visible changes in changes/ or orbit/changes/.
  See Changes files for more information.
• Documented any API changes (docs/REST API/rest-api.md or docs/Contributing/API-for-contributors.md)
• Documented any permissions changes (docs/Using Fleet/manage-access.md)
• Input data is properly validated, SELECT * is avoided, SQL injection is prevented (using placeholders for values in statements)
• Added support on fleet's osquery simulator cmd/osquery-perf for new osquery data ingestion features.
• Added/updated tests
• Manual QA for all new/changed functionality
  • For Orbit and Fleet Desktop changes:
    • Manual QA must be performed in the three main OSs, macOS, Windows and Linux.
    • Auto-update manual QA, from released version of component to new version (see tools/tuf/test).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (15dbc1b) 58.83% compared to head (eb5c13c) 58.87%.
Report is 10 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #14954      +/-   ##
==========================================
+ Coverage   58.83%   58.87%   +0.03%     
==========================================
  Files         953      953              
  Lines       80236    80241       +5     
  Branches     2222     2222              
==========================================
+ Hits        47204    47238      +34     
+ Misses      29362    29330      -32     
- Partials     3670     3673       +3     

Flag	Coverage Δ
backend	59.51% <ø> (+0.04%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

see 3 files with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[roperzh]

closing in favor of https://github.com/fleetdm/fleet/pull/15065/files