Train Bounded Portable Contextual RAPM

Run the full forward recursive fit:

uv run nba-train-forward-bounded-hierarchical-portable-matchup-contextual-rapm

To retain a progress log while it runs:

uv run nba-train-forward-bounded-hierarchical-portable-matchup-contextual-rapm \
  > /private/tmp/forward-bounded-portable-contextual-rapm.log 2>&1
tail -f /private/tmp/forward-bounded-portable-contextual-rapm.log

The command re-estimates every season from 1996-97 through the requested target, carrying only completed player and bounded contextual states forward. The default target is 2025-26.