JP-4323: Improve performance of tso median calculation in outlier detection

[braingram]

Resolves JP-4323

On main jwst/regtest/test_miri_image_tso.py::test_log_tracked_resources_miri_image_tso (based on regtest runs):

• takes 173 seconds
• has peak memory usage of 31G

With this PR the test:

• takes 51 seconds
• has peak memory usage of 4G

Running the same test locally the runtime pattern agrees (95 on main, 33 with PR).

Regtests: https://github.com/spacetelescope/RegressionTests/actions/runs/24400023732
all pass. Here's a plot of the memory usage for the latest run:

We still have something leaking but at least the peak is reduced.

Tasks

• If you have a specific reviewer in mind, tag them.
• add a build milestone, i.e. Build 12.0 (use the latest build if not sure)
• Does this PR change user-facing code / API? (if not, label with no-changelog-entry-needed)
  • write news fragment(s) in changes/: echo "changed something" > changes/<PR#>.<changetype>.rst (see changelog readme for instructions)
    • if your change breaks step-level or public API (as defined in the docs), also add a changes/<PR#>.breaking.rst news fragment
  • update or add relevant tests
  • update relevant docstrings and / or docs/ page
  • start a regression test and include a link to the running job (click here for instructions)
    • Do truth files need to be updated ("okified")?
      • after the reviewer has approved these changes, run okify_regtests to update the truth files
• if a JIRA ticket exists, make sure it is resolved properly

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.76%. Comparing base (34543ea) to head (06de8e1).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #10452      +/-   ##
==========================================
- Coverage   85.77%   85.76%   -0.01%     
==========================================
  Files         372      372              
  Lines       40065    40063       -2     
==========================================
- Hits        34364    34362       -2     
  Misses       5701     5701              

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[emolter]

Code LGTM just one comment about the changelog

[drlaw1558]

Ah, this is probably why I had to put the SOSS notebook onto a 64 GB github CI runner. Great to see the lower memory footprint plus faster runtime, thanks!

[melanieclarke]

Looks good, thank you! One small request for more explanation.