Fix checkstyle action token to resolve integration permission error

[Copilot]

The checkstyle GitHub action fails with "Resource not accessible by integration" due to insufficient permissions on GITHUB_TOKEN.

Changes

• Updated checkstyle action to use REPO_TOKEN instead of GITHUB_TOKEN in .github/workflows/main.yml

This aligns with the existing coverage report action which already uses REPO_TOKEN for the same permission requirements.

- name: Upload checkstyle report
  uses: jwgmeligmeyling/checkstyle-github-action@master
  with:
    path: '**/checkstyle-result.xml'
-   token: ${{ secrets.GITHUB_TOKEN }}
+   token: ${{ secrets.REPO_TOKEN }}

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Fix checkstyle 'Error: HttpError: Resource not accessible by integration' error</issue_title>
<issue_description></issue_description>

<agent_instructions>You change token: ${{ secrets.GITHUB_TOKEN }} to ${{ secrets.REPO_TOKEN }}</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Fix checkstyle 'Error: HttpError: Resource not accessible by integration' error #391

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[feelform]

LCOV of commit 5bc558e during CI #1307

Summary coverage rate:
  lines......: 84.4% (3523 of 4175 lines)
  functions..: 82.3% (849 of 1032 functions)
  branches...: 70.6% (1117 of 1583 branches)

Files changed coverage rate: n/a