Investigate estimated CLR match

**Overview**
Several grants have seen some large swings in their estimated match amounts in the last 24-36 hours. I'd like someone to investigate the CLR calculations/estimations to make sure everything is running normally.

**Additional data points**
- [This grant](https://gitcoin.co/grants/3531/dataverse-your-ownable-personal-space) was at an estimated match of ~$80k yesterday, and is now at $5k
- Approximately 20% of our overall round contributions have happened in the last 24-36 hours
- [this grant](https://gitcoin.co/grants/4874/autonomous-web3-carbon-offsetting-for-decentralis) seems to have received a large number of contributions in the last period

No files, tests, or entry points are named. Start by tracing the CLR calculation and estimation flow, then compare the two linked grants with the round's recent contribution activity. Done means determining whether the swings are expected and documenting the cause or identifying a calculation problem.

Written by the indexing model from the issue text.