fix(ci): replace grep -P with portable sed for cross-platform compatibility

[iap]

Summary

Fixes CodeRabbit finding from PR #242 about macOS/BSD portability.

Problem

grep -P (Perl regex) is not available on macOS/BSD systems by default, causing the workflow validation script to fail on those platforms.

Solution

• Replaces grep -P with sed -E (POSIX extended regex)
• Handles both quoted and unquoted node versions
• Supports semantic versions (e.g., 24.16.0)
• Skips matrix variables (returns empty, as intended)

Changes

- WORKFLOW_NODE=$(grep "node-version:" "$workflow" | head -1 | grep -oP "'\\K[0-9]+" || true)
+ WORKFLOW_NODE=$(grep "node-version:" "$workflow" | head -1 | sed -nE "s/.*node-version:[[:space:]]*['\"]?([0-9.]+).*/\1/p")

Testing

bash .github/scripts/validate-workflows.sh
# ✅ All workflows validated

# Test semantic version extraction
echo "node-version: '24.16.0'" | sed -nE "s/.*node-version:[[:space:]]*['\"]?([0-9.]+).*/\1/p"
# Output: 24.16.0

Related

• Fixes CodeRabbit finding from PR fix(ci): increment ERRORS counter on Node version mismatch #242
• Co-authored-by: CodeRabbit support@coderabbit.ai

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

None

[chatgpt-codex-connector]

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