RankProgressResult gains a TierAdvanced bool (defaulted false so the 7-arg
positional-constructor sites don't break). Set true iff the grant is a win
AND RankTier.Name resolves both pre-grant and post-grant to distinct strings —
i.e. a promotion crossed a tier boundary.
Explicitly guards on isWin so a demotion (in principle possible after a loss
below a tier floor, though the current floor rules prevent it) never fires
the achievement backward.
Three new tests: no-cross win, beginner→d cross, loss stays false.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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