Temporary layer switch job -> event

[greenc-FNAL]

• Bypass caching issues

[greenc-FNAL]

Review the full CodeQL report for details.

[Copilot]

Pull request overview

This PR switches the Python test data products and the Python plugin’s hard-wired product-query layer from "job" to "event" as a workaround to bypass caching-related issues.

Changes:

• Update the C++ Python test source (cppsource4py) to publish all products on the "event" layer instead of "job".
• Update the Python plugin wrapper to query inputs/outputs on the "event" layer by default.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
test/python/source.cpp	Publishes the Python-test input products (i, j, k, etc.) on the event layer to match the new plugin behavior.
plugins/python/src/modulewrap.cpp	Changes the Python plugin’s global hard-wired layer constant from job to event, affecting all Python module product queries.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

@@            Coverage Diff             @@
##             main     #316      +/-   ##
==========================================
- Coverage   80.29%   80.13%   -0.16%     
==========================================
  Files         126      126              
  Lines        3065     3071       +6     
  Branches      545      545              
==========================================
  Hits         2461     2461              
+ Misses        383      381       -2     
- Partials      221      229       +8     

Flag	Coverage Δ
unittests	80.13% <ø> (-0.16%)	⬇️

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Files with missing lines	Coverage Δ
plugins/python/src/modulewrap.cpp	75.04% <ø> (-0.45%)	⬇️

... and 3 files with indirect coverage changes

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