Add Copilot instructions to enforce green status checks before PR review

[Copilot]

GitHub Copilot agents can mark PRs ready for review without waiting for CI/CD status checks to complete. This creates noise when builds or tests fail.

Changes

Created .github/copilot-instructions.md to enforce pre-review requirements:

• Build status verification: Azure Pipelines Build and Lint jobs, GitHub Actions CodeQL workflow
• Test requirements: Unit tests (make unittest) must pass
• Code quality gates: Linting (make golangci-lint) must pass with no new violations
• Status check verification: Instructions for using gh pr checks and gh pr view --json statusCheckRollup
• Exception handling: Guidance for pre-existing failures and documentation requirements
• Build command reference: Accurate Makefile target descriptions

Key Requirements Enforced

All Copilot PRs must verify:

• ✅ All Azure Pipelines jobs green
• ✅ All GitHub Actions workflows green
• ✅ No failing or pending status checks
• ✅ Draft status until all checks pass

The instructions file is automatically read by GitHub Copilot when working on PRs in this repository.

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[madhanrm]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).