Proposed Columna API extension: gap-aware process monitoring and capability.
Chart limits/statistics are delegated to spc.ts; capability indices to
capability.ts; exact intervals to basic.ts; descriptive estimates to
descriptive.ts. This module adds source alignment, a frozen baseline and
separately documented within-sigma estimators. No browser/UI dependencies.
Proposed Columna API extension: gap-aware process monitoring and capability. Chart limits/statistics are delegated to spc.ts; capability indices to capability.ts; exact intervals to basic.ts; descriptive estimates to descriptive.ts. This module adds source alignment, a frozen baseline and separately documented within-sigma estimators. No browser/UI dependencies.