* Require `FixedPointOperand` for Balances

* Delay deposit calculation

* Make refunds pro rata of consumed storage

* Add storage migration

* Fix clippy

* Add liquidity checks

* Fixe delayed deposit limit enforcement

* Defer charges

* Import Vec

* Add try-runtime hooks for migration

* Fix warning

* Adapt to new OnRuntimeUpgrade trait

* Apply suggestions from code review

Co-authored-by: Sasha Gryaznov <[email protected]>

* fmt

* Apply suggestions from code review

Co-authored-by: Sasha Gryaznov <[email protected]>

* More suggestions from code review

Co-authored-by: Sasha Gryaznov <[email protected]>