Ensure GitHub Actions run on this branch

[Copilot]

This PR ensures all GitHub Actions are properly configured to run on this branch for the V6 development.

Investigation findings:

• The repository uses GitHub's default CodeQL setup, which is mutually exclusive with custom advanced configuration workflows
• Attempting to enable a custom CodeQL workflow caused a SARIF processing error: "CodeQL analyses from advanced configurations cannot be processed when the default setup is enabled"

Resolution:

• Kept the custom CodeQL workflow disabled (as codeql.yml.disable) to avoid conflicts with the default setup
• Verified Node.js CI and ESLint workflows are properly configured and running

Current state:
All GitHub Actions now run successfully on this branch:

• ✅ Node.js CI - Running via custom workflow
• ✅ ESLint - Running via custom workflow
• ✅ CodeQL - Running via GitHub's default setup (not custom workflow)

The repository maintains complete CI/CD coverage including automated security scanning, tests, and linting.

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[davidjbradshaw]

@copilot The action failed with the following error

Error: Code Scanning could not process the submitted SARIF file:

[Copilot]

@copilot The action failed with the following error

...

Fixed in commit 946c2ee. The error occurred because GitHub has the default CodeQL setup enabled, which conflicts with custom advanced configuration workflows. I've disabled the custom CodeQL workflow to resolve the conflict. The repository continues to have CodeQL scanning through the default setup, plus ESLint and Node.js CI workflows running successfully.