* Adds an init_read_only() fn in zebra-state
* moves elasticsearch initialization to `FinalizedState::new_with_debug()`
* Updates callers of `FinalizedState::{new, new_with_debug}` to pass a bool to try enabling elasticsearch
* Adds a non-finalized read state syncer to zebra-rpc
* moves, removes, updates, or addresses TODOs
* reduces disk IO while waiting for the a new chain tip & updates the chain tip sender when the finalized tip has changed.
* Returns boxed errors from RpcRequestClient methods instead of color_eyre type
* Avoids resetting the non-finalized state when there's an error getting a block unless it has the missing block error code.
* Adds stub for acceptance test(s) and removes outdated TODO
* adds TODOs for testing
* Tests that `ChainTipChange` is updated when the non-finalized best chain grows
* adds a last_chain_tip_hash and uses a FuturesOrdered for getblock requests
* Fixes a pre-flush sync issue by using a secondary db instead of a read-only db
* Moves disk IO to blocking tasks
* Updates acceptance test to how forks are handled
* Checks synced read state for all of the expected blocks
* checks that there isn't a tip change until the best chain changes
* checks for chain tip changes in test
* run test without feature
* fixes lint
* Fixes compilation/test issues
* Adds docs / comments, moves HexData out from behind the getblocktemplate-rpcs feature flag, moves test behind the mining feature flag.
* Fixes lints
* removes syncer and rpc-syncer features
* Fixes test on Windows, applies suggestions from code review
* Updates `POLL_DELAY` documentation
* Updates method docs
* Fixes a test bug
* use rpc-client feature in zebrad production code
* use rpc-client feature in zebra-node-services for building zebra-rpc crate
---------
Co-authored-by: Pili Guerra <mpguerra@users.noreply.github.com>
Co-authored-by: Alfredo Garcia <oxarbitrage@gmail.com>