Improve rebasing supply accuracy V2

Code Change Checklist

To be completed before internal review begins:

[ ] The contract code is complete
[ ] Executable deployment file
[ ] Fork tests that test after the deployment file runs
[ ] Unit tests *if needed
[ ] The owner has done a full checklist review of the code + tests

Internal review:

[ ] Two approvals by internal reviewers

Deploy checklist

Two reviewers complete the following checklist:

- [ ] All deployed contracts are listed in the deploy PR's description
- [ ] Deployed contract's verified code (and all dependencies) match the code in master
- [ ] Contract constructors have correct arguments
- [ ] The transactions that interacted with the newly deployed contract match the deploy script.
- [ ] Governance proposal matches the deploy script
- [ ] Smoke tests pass after fork test execution of the governance proposal

OriginProtocol / origin-dollar

Improve rebasing supply accuracy V2 #2314

Code Change Checklist

Deploy checklist