* read only account cache
* tests
* clippy
* cleanup
* new file, add tests
* remove copy/paste code from test
* remove dead code
* all loads use cache
* remove stale comments
* add metrics logging for read only cache size
* report read only cache hits and misses
* consistency
* formatting
* rename, add comment
* u64
* better interaction with existing cache
* lru list saved between cleans
Jeff Washington (jwash)