Upgrade Compound II’s Oracle to UAV3

To follow up on what @CL_Michael has shared, OpenZeppelin performed our own separate simulations using Foundry to confirm that the fix was successful and the price reporting works as expected.

While we don’t normally publish the testing scripts used in our security reviews, I’ve had our auditors make an exception in this case given the past incident. This should serve as additional validation of the upgrade’s safety on top of the more comprehensive tests that ChainLink has already run and published. Community members are welcome to review and run the scripts themselves in the repo below.

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