Add OUTPUT_HEADER_ROW constant (row 10) to allow space above error report:
- Preserves rows 1-9 for title, instructions, or summary information
- Error report header now starts at row 10
- Only clears data from header row downwards (preserves upper content)
- Removed AutoFit to maintain custom column widths
This provides flexibility for report formatting and allows
additional context to be added above the error analysis data.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>