Scores now use only our own tracked history

HV Score inputs are computed from the same daily record shown on vault profiles. Performance earned before our tracking began no longer influences scores.

• Previously the score used the source's full lifetime history, while profiles show our own tracked record (since August 2025) — an inconsistency.
• Now every scoring input (returns, drawdowns, volatility, decayed long-term return) comes from the tracked daily series stored in our database.
• Effect: vaults with large pre-tracking gains lose the scoring advantage from that period; recent, verifiable performance matters more.
• All vault scores were recalculated.