Fix test-coverage CI: remove defunct context() calls, add failure log step

[Copilot]

testthat 3.2.0+ made context() defunct (hard error), causing every test file to fail on load and test_check("portalcasting") to report "No test files found" despite the tests existing.

Changes

• tests/testthat/test-*.R (26 files): Strip all context(...) calls — the only change needed to restore test discovery.
• .github/workflows/test-coverage.yaml: Add a failure()-gated step that prints the first 220 lines of any testthat.Rout.fail found under /tmp, making future CI failures immediately diagnosable without artifact downloads.

- name: Show testthat failure log
  if: failure()
  run: |
    find /tmp -name "testthat.Rout.fail" -print -exec sed -n '1,220p' {} \;
  shell: bash

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Not backwards compatible new feature (breaking change which adds functionality)
• New model
• New dataset
• Documentation edit

How Has This Been Tested?

Relies on the test-coverage GitHub Actions workflow to validate. No test logic was altered — only the defunct context() registration calls were removed. Existing tests are unchanged.

Checklist:

• My code follows the style guidelines of this project
• I follow the code of conduct for this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings

Review

@juniperlsimonis

[henrykironde]

I thin we can undo the changes in .github/workflows/pkgdown.yaml‎

[henrykironde]

we do not need to change this file.

[henrykironde]

remove the changes on the file .github/workflows/pkgdown.yaml‎ We do bot need them @copilot

[Copilot]

remove the changes on the file .github/workflows/pkgdown.yaml‎ We do bot need them @copilot

Done in commit 21f034f.