Copyability no longer punishes normal drawdowns in proven vaults

Entering a quality vault on a dip is no longer scored as riskier than entering at a high. Drawdown penalties now depend on vault quality and whether the dip is near its historical maximum.

• Previously every current drawdown reduced Copyability equally, regardless of the vault's track record.
• Now, for proven vaults (high HV Score, Consistency and Confidence), a normal historical drawdown is neutral to slightly positive — a discount entry, not a warning.
• Young or unstable vaults are still penalized for being underwater.
• A drawdown near the vault's historical maximum is penalized for everyone, as it may indicate a regime change rather than a normal dip.
• HV Score itself is unchanged. All vault ratings were recalculated.