Applies the 2026-10-21 decisions: A column = GL, B column = design grade,
20 m station numbering, gaps marked [미확정]. Regression slope of the grade
column is compared with the drawn S=2.4913%. No value is adjusted.
Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01A5Cun3RHQKna9qxE6ybZ4A
