Potential fix for code scanning alert no. 1: Workflow does not contain permissions

[0xC000005]

Potential fix for https://github.com/0xC000005/PyChebyshev/security/code-scanning/1

In general, to fix this problem you should explicitly declare a permissions: block that grants only the minimal needed scopes to the GITHUB_TOKEN. This can be set at the workflow root (applies to all jobs without their own block) or per-job. For this workflow, none of the steps require write access to the repository; they only need to read the code, so contents: read is sufficient. The Codecov upload uses an explicit secrets.CODECOV_TOKEN, not GITHUB_TOKEN, so it does not require extra GitHub token scopes.

The best minimal fix without changing functionality is to add a workflow-level permissions: block immediately after the name: Tests line (or before jobs:), setting contents: read. This will restrict the GITHUB_TOKEN to read-only repository contents while leaving all existing steps functional. No additional imports or methods are required because this is a YAML configuration change only.

Concretely:

• Edit .github/workflows/test.yml.

• After line 1 (name: Tests), insert:

  permissions:
    contents: read

No other lines need to be changed.

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Pull request overview

This PR addresses GitHub code scanning alert #1 by explicitly restricting the default GITHUB_TOKEN permissions in the CI workflow to least-privilege (read-only repository contents).

Changes:

• Add a workflow-level permissions: block to set contents: read for the GITHUB_TOKEN.

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