clean up state logs

- [ ] remove localeMessages
- [ ] probably don't need all 40 recent blocks

Start by locating the state-log code and the entries named localeMessages and recent blocks. Confirm which state logs are generated and how many recent blocks are needed, then remove localeMessages and reduce the retained recent blocks; done means the logs contain only the intended state data without regressions.

Written by the indexing model from the issue text.