Migrate coverage reporting from Coveralls to Codecov

[Copilot]

Replaces Coveralls with Codecov for coverage reporting across all CI jobs, removing the php-coveralls dependency in favor of the codecov/codecov-action. Switches the coverage driver from xdebug to pcov for faster coverage collection.

Changes

• .github/workflows/ci.yml — Updated all 6 PHPUnit jobs (MySQL/MariaDB/Postgres × PDO/Doctrine):
  • Simplified clover output path from build/logs/clover.xml → clover.xml (removes mkdir -p build/logs)
  • Replaced php-coveralls upload step with codecov/codecov-action@v5 using CODECOV_TOKEN
  • Switched coverage driver from xdebug to pcov
• README.md — Added Codecov coverage badge after the existing CI badge
• composer.json — Removed php-coveralls/php-coveralls from require-dev

Original prompt

Migrate from Coveralls to Codecov for coverage reporting, mirroring the changes made in brick/math#109.

Changes required

1. .github/workflows/ci.yml

In every PHPUnit job that uploads coverage to Coveralls, make the following changes:

• In the "Run PHPUnit with coverage" step, change the clover output path from build/logs/clover.xml to clover.xml (and remove the mkdir -p build/logs line, since the file is now written to the root). For example:

  - name: Run PHPUnit with coverage
    run: vendor/bin/phpunit --coverage-clover clover.xml
    if: ...

  Note: If there is a --fail-on-skipped flag, keep it. If not, don't add it.

• Replace every "Upload coverage report to Coveralls" step with:

  - name: Upload coverage to Codecov
    uses: codecov/codecov-action@v5
    env:
      CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
    if: ...  # keep the same `if:` condition as the original step, if any

  (Remove the old step that runs vendor/bin/php-coveralls with COVERALLS_REPO_TOKEN.)

Note: brick/lock has multiple PHPUnit jobs (for different database backends). Make sure to update all of them.

2. README.md

The README currently does not have a Coveralls badge. Add a Codecov badge after the existing Build Status badge:

[![Coverage](https://codecov.io/github/brick/lock/graph/badge.svg)](https://codecov.io/github/brick/lock)

Place it right after the line:

[![Build Status](https://github.com/brick/lock/workflows/CI/badge.svg)](https://github.com/brick/lock/actions)

3. composer.json

Remove php-coveralls/php-coveralls from require-dev.

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[BenMorel]

@copilot Use pcov for coverage.

[codecov]

Welcome to Codecov 🎉

Once you merge this PR into your default branch, you're all set! Codecov will compare coverage reports and display results in all future pull requests.

Thanks for integrating Codecov - We've got you covered ☂️

[Copilot]

@copilot Use pcov for coverage.

Done — all 6 PHPUnit jobs now use pcov instead of xdebug for coverage (commit 9a96c16).