The FullCard migration requires offense_col and player_id on each player's
DataFrame row. The retrosheet pipeline calculates ratings before posting,
so both fields were missing — causing silent card layout builder failures.
Adds a three-tier resolution: CSV cache → API bulk fetch → deterministic
hash fallback. Also includes player_id fallback in both calcs modules.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
