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Vantage 1.3.0 - new version chess engine

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Vantage - UCI chess engine
Author: Vaishak Menon

Vantage is a high-performance, UCI-compatible chess engine written in Rust. It utilizes magic bitboards for move generation and advanced search techniques to play at a competitive level.

Vantage 1.3.0 what's new?

Phase 0 bugfixes: +150 ELO
Fixes:
- Persist TT across searches (was recreated every search call)
- Store actual score on beta cutoff instead of beta value
- Add TT probe/store to quiescence search
Audited (no change needed):
- LMP break vs continue confirmed correct
Tested but reverted (regression):
- History aging /=2 (too gentle, reverted to /=8)
- Draw contempt 0 (hurt winrate vs weaker opponents, reverted to -50)
Results vs baseline:
- Fairymax (1890): 77% -> 91%
- Phalanx (2600):  17% -> 31%
- Estimated ELO:   ~2100 -> ~2250-2300






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