Bump the fwl-io floor to 26.8.31

[timlichtenberg]

Description

Bump the fwl-io floor from >=26.7.25 to >=26.8.31 so PROTEUS guarantees the fixes released in fwl-io 26.8.31: the Dataverse mirror 2xx-bad-body fix (FormingWorlds/fwl-io#37), the fwl.-prefix logger fix (FormingWorlds/fwl-io#34), and the _request docstring and success-path test (FormingWorlds/fwl-io#38). Release: https://github.com/FormingWorlds/fwl-io/releases/tag/26.08.31 (published on PyPI as 26.8.31, the normalized CalVer form).

The adjacent comment is updated to describe the current pin.

Validation of changes

Confirmed fwl-io 26.8.31 is live on PyPI, and pip install --dry-run "fwl-io>=26.8.31" resolves cleanly in a PROTEUS conda env ("Would install fwl-io-26.8.31", all sub-dependencies already satisfied). macOS with Python 3.12.

Checklist

• I have followed the contributing guidelines
• My code follows the style guidelines of this project
• I have performed a self-review of my code
• My changes generate no new warnings or errors
• I have checked that the tests still pass on my computer
• I have updated the docs, as appropriate
• I have added tests for these changes, as appropriate
• I have checked that all dependencies have been updated, as required

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.13%. Comparing base (b06837e) to head (7156d10).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #841   +/-   ##
=======================================
  Coverage   93.13%   93.13%           
=======================================
  Files         112      112           
  Lines       16715    16715           
  Branches     2987     2987           
=======================================
+ Hits        15567    15568    +1     
+ Misses       1148     1147    -1     

Flag	Coverage Δ
unit-tests	86.74% <ø> (+0.01%)	⬆️

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Too fast.

[egpbos]

The tests that are failing trip over a hardcoded specific version string in src/proteus/data/__init__.py, FWL_IO_FLOOR, which is set to the version of fwl-io. The comment notes that this string refers to a schema version. Is that really the case? Is the data schema intended to change with every fwl-io version? If not, a solution would be to separate the schema versioning from the fwl-io versioning. We already have a configuration file version, something similar would make sense for the output as well. I would go for just a single version integer.