[Tech]: Change the format of stabilityFeeRate to simple percent

[ra9mls]

Problem statement

We need to operate with numbers in ms per year, APR 1% in milliseconds is 0.000000000000315303 APR 2% in milliseconds is 0.000000000000627498 APR 5% in milliseconds is 0.000000000001546096 APR 10% in milliseconds is 0.000000000003020250 APR 15% in milliseconds is 0.000000000004428901 APR 20% in milliseconds is 0.000000000005777600

It's hard to manage in future

Description

No response

Definition of Done

stabilityFeeRate sets like simple numbers in percents

Requirements

No response