Record the 'stored' flag as lowercase true/false

[jmthomas]

closes #2947

No other changes are needed because when we deserialize the value we call ConfigParser.handle_true_false which calls upper and compares with TRUE and FALSE.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.49%. Comparing base (71c95ef) to head (ae829cd).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2949   +/-   ##
=======================================
  Coverage   78.48%   78.49%           
=======================================
  Files         673      673           
  Lines       55333    55333           
  Branches      728      728           
=======================================
+ Hits        43428    43433    +5     
+ Misses      11827    11822    -5     
  Partials       78       78           

Flag	Coverage Δ
python	79.75% <ø> (-0.01%)	⬇️
ruby-api	80.75% <ø> (+0.12%)	⬆️
ruby-backend	82.14% <ø> (ø)

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud