PDP-536: Adding copyright check

[SameeraPriyathamTadikonda]

Description

Checklist:

• Owner:

• JIRA_ID as part of branch/PR name

• Rebase the branch with upstream

• Squashed all commits into a single commit

[Copilot]

Pull Request Overview

This PR adds copyright header validation to the GitHub Actions workflow, implementing an automated check to ensure all files contain proper copyright headers.

Key changes:

• Integrates a reusable copyright validation workflow into the existing PR workflow
• Configures copyright validation with a start year of 2018 and specific file exclusions

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
.github/workflows/pr-workflow.yaml	Adds copyright validation job with appropriate permissions
.copyrightconfig	Defines copyright validation configuration with start year and file exclusions

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[Copilot]

Using @main as the workflow reference creates a security risk as it always pulls the latest version without verification. Consider pinning to a specific commit SHA or tagged version for better security and reproducibility.

[Copilot]

[nitpick] The exclusion pattern '.github/*' will exclude all GitHub workflow files from copyright validation, but the newly added workflow files should probably have copyright headers. Consider being more specific about which GitHub files to exclude.

Suggested change

	filesexcluded: .github/*, README.md, Jenkinsfile, Makefile
	filesexcluded: .github/ISSUE_TEMPLATE/*, .github/PULL_REQUEST_TEMPLATE/*, .github/FUNDING.yml, README.md, Jenkinsfile, Makefile

[vitalykorolev]

@SameeraPriyathamTadikonda how can we test this outside of develop branch? Can this be in a feature branch before going to develop?