## [M-1] Price oracle could get a stale price

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## Vulnerability Details

In the `KittyVault::getUserVaultMeowllateralInEuros` function does not check for stale price using updateAt and roundId.

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Links:

https://github.com/Cyfrin/2024-08-kitty-fi/blob/950ac553b935a3bf9277b71ffa5662a84f2633fe/src/KittyVault.sol#L153

https://github.com/Cyfrin/2024-08-kitty-fi/blob/950ac553b935a3bf9277b71ffa5662a84f2633fe/src/KittyVault.sol#L155

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## Impact

A stale price can cause `getUserVaultMeowllateralInEuros` to return a wrong value causing several function which depends on it to malfunction.

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## Tools Used

Manual Review

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## Recommendations

Check answer, updateAt and roundId when getting price:

```diff

- (, int256 collateralToUsdPrice, , , ) = i_priceFeed.latestRoundData();

+ (uint80 roundId, int256 collateralToUsdPrice, , uint256 updatedAt, uint80 answeredInRound) = i_priceFeed.latestRoundData();

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+ require(updatedAt > 0, "Round is not complete");

+ require(answer >= 0, "Invalid feed answer");

+ require(answeredInRound >= roundID, "Stale price")

```

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same should be done for `i_euroPriceFeed`

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