Fix 9 vs 2 deviation incorrectly flagging double as wrong
The deviation was encoded as { correctMove: Hit, index: ['<', 1] }, which matched when TC < 1 — where Hit is already basic strategy. At TC >= 1 (where Double is correct per I18), the engine fell back to BasicStrategyChecker and flagged Double as a basic strategy error.
Fixed by encoding as { correctMove: Double, index: ['>=', 1] }.