Vault: Locked Profit Degradation (just-in-time defense)

What You Are Building

Yearn V2's signature security mechanism. After a strategy reports gain, the gain doesn't immediately become withdrawable, it linearly unlocks over a configurable period (default ~6 hours). New deposits during the window pay the gross share price (so they don't profit from the locked portion); withdrawals see the net price (locked portion excluded). The asymmetry is the defense.