Audit - Low Severity Issues

[Kogaroshi]

L01 : cf36d0590369de8d695661cbe51bfcca54a489cd
L02 : c9051b4f382d4497ecc2a47afd36a48d5e06a1a7
L03 : 4b5a107a5b65250ffd86484010226b2ed5f579c6
L04 : The code is duplicated to allow to revert with 2 customs Errors, which the totalAvailable() method cannot provide, since it ignores those error cases and return 0 instead => not making changes for this issue
L05 : Not making changes for this issue
L06 : 132bc388be79a4d7d8f71e083b683f83a6d8bb42
L07 : 3db1df87533f003c452774c560f3d217f0bd1d67
L08 : 10c66a275caa95e9df42c128424c96c31c5a8921
L09 : 56d723c72afde8d0c05e5e1bd3f94b82eebf3698 for applied changes, others were left the current way

N01 : The bufferRatio is applied on user funds held by the Vault, and not protocol owned part of the Vault (represented by reserveAmount), which is why the reserveAmount is not included in the bugger calculations. The totalRentedAmount is included, even if it is not current protocol solvency (as it is rented), it is users owned assets, which need to be part of the buffer calculations.