docs: update TRD to v2.2 for client feasibility engine

Align feasibility engine with client workflow and add GSM case selection.

fix: unify twill weave normalization, distance-weighted recommendation

fix: aggressive blend normalization, remove garbage rows, add blend percentage proximity matching

fix: exclude invalid Fin PPI=0 articles from PPI-relaxed fallback in prediction

Deploy: case-study recommendation engine + ply yarn fix + weighted percentile removal

Initial commit: PDC Intelligence application