Add copilot-swe-agent[bot] to CLA allowlist

[Copilot]

Overview

This PR adds copilot-swe-agent[bot] to the CLA allowlist in the GitHub Actions workflow configuration to ensure that Copilot contributions are automatically exempted from CLA signature requirements.

Changes

Updated .github/workflows/cla.yml to include copilot-swe-agent[bot] in the allowlist alongside the existing dependabot[bot] and stesee entries.

Rationale

GitHub Copilot (appearing as copilot-swe-agent[bot] in commit history) is an automated tool that creates contributions on behalf of the repository. Similar to how Dependabot is already allowlisted, Copilot should be exempted from CLA signing requirements since:

1. It's an automated bot, not a human contributor
2. It operates under GitHub's service terms
3. Requiring CLA signatures for bot accounts is impractical and unnecessary

Testing

• ✅ YAML syntax validated
• ✅ Code review passed
• ✅ Security scan (CodeQL) passed with no alerts

This is a minimal configuration change with no functional code modifications.

Original prompt

Add Copilot to the allowlist in the cla.yml file if not already present. If the cla.yml file does not exist, create one in the appropriate location with Copilot in the allowlist. The goal is to ensure Copilot is listed as an allowed contributor for CLA checks.

This pull request was created as a result of the following prompt from Copilot chat.

Add Copilot to the allowlist in the cla.yml file if not already present. If the cla.yml file does not exist, create one in the appropriate location with Copilot in the allowlist. The goal is to ensure Copilot is listed as an allowed contributor for CLA checks.

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