Fix R-CMD-check CI pipeline failure

[pjt222]

Problem

The R-CMD-check GitHub Actions workflow is failing on main branch while deployment continues to work.

Recent failing runs:

• Commit a611b2e (truncation feature)
• Commit 338da13 (truncation feature)

Impact

• Package may have undetected issues (NOTEs, WARNINGs)
• CRAN submission would fail
• CI/CD pipeline is not providing full coverage

Investigation Steps

1. Review R-CMD-check logs for specific errors
2. Check if missing system dependencies in CI environment
3. Verify NAMESPACE exports are correct
4. Check for any hard-coded paths or platform-specific code

Acceptance Criteria

• R-CMD-check passes on main branch
• No NOTEs or WARNINGs in check output
• Pipeline runs successfully on push

Priority: Critical
Labels: bug, ci