* Make code execution time logs shorter
* Do ZK parameter preloads in the lightwalletd tests that need them
* Try to re-launch `lightwalletd` when it hangs during sync tests
* Increase full sync timeout
* Clear the `zebrad` logs during `lightwalletd` tests, to avoid logging deadlocks
* Actually clear more than one line of logs
* Check zebrad and lightwalletd output in parallel threads, while waiting for zebrad
* Check zebrad and lightwalletd output in parallel threads, while waiting for lightwalletd
* Improve test logging
* Fix a log typo
* Only wait for lightwalletd once, because its logs stop after the initial sync
* Look for cached state disks for this commit and branch first
* Only copy the state once in the send transactions test
* Wait longer for lightwalletd gRPC server startup
* Add some function docs
* cargo fmt --all
* 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