Prop 207: Emergency Parameter Update: Set USDC Borrow Interest Rate to 0% to Halt Bad-Debt Growth

This proposal applies an emergency parameter update to the USDC borrow interest model. In the short term, by setting the USDC borrow curve to a flat 0% (base, kink, and max), the interest accrual stops entirely including bad debt. This prevents further growth of the deficit while architectural fixes are prepared. All other parameters remain unchanged.