* Fix clippy::let_and_return
* Increase lightwalletd test timeouts for zebrad slowness
* Add a `zebrad_update_sync()` test, that update syncs Zebra without lightwalletd
* Run the zebrad-update-sync test in CI
* Add extra zebrad time to workaround lightwalletd bugs
* Add a CodeTimer diagnostic struct for long-running code
* Time state init and each state request, log when it takes too long
* Add code locations to execution timers
* Instrument state futures and functions with tracing spans
* Only log each code timer once
* Make displayed times shorter
* Update comments about note commitment tree rebuilds
* Add info-level logs to time note commitment tree rebuilds
* Log the number of rebuilt blocks after a fork, and the time per block
* Move humantime formats to zebra-chain
* Use human-friendly time formatting
teor