Liquidation program

[pileks]

Adds the liquidation program — an orderly treasury redemption mechanism for projects winding down. A project deposits quote tokens (e.g. USDC) into a vault, eligible token holders burn their project tokens to receive a proportional share within a time-bounded refund window, and the authority reclaims whatever's left after the deadline.

Lifecycle

initialize_liquidation → set_refund_record(s) → activate_liquidation → refund → withdraw_remaining_quote

• Setup: Create liquidation, configure per-user refund records. Two separate authorities: record_authority (sets records) and liquidation_authority (funds vault, withdraws remainder).
• Activation: One-way, irrevocable. Transfers exact total_quote_refundable into the vault, starts the clock.
• Refund window: Users burn base tokens, receive proportional quote. Partial and multiple refunds supported.
• Post-deadline: Authority withdraws remaining vault balance. Refunds blocked.