Store settled lending orders

[desytech]

We want to store settled lending order into the database. Please consider that we don't want to fetch the complete history, fetch the diff only. To diff use the last maturity timestamp in the database.

We have to decide which data we would use

1. settled loans or
2. order history

These two data pool are nearly the same, except order history contains canceled orders also.

This information can be useful to:

• get the released interest amount
• repayment characteristics