* Remove serialization of AccountStorageEntry fields
* Add metric for evaluating BankRc serialization time
* Serialize AppendVec current len
* Add dashboard metrics
* Move flush of AppendVecs to packaging thread
* Move status cache serialization to the Snapshot Packager service
* Minor comment updates
* use ok_or_else instead of ok_or
* satus cache
* Remove assert when snapshot format is wrong
* Fix compile
* Remove slots_to_snapshot from bank forks
* Address review comment
* Remove unused imports
* Remove unnecessary entry_height from BankInfo
* Refactor process_blocktree to support process_blocktree_from_root
* Refactor to process blocktree after loading from snapshot
* On restart make sure bank_forks contains all the banks between the root and the tip of each fork, not just the head of each fork
* Account for 1 tick_per_slot in bank 0 so that blockhash of bank0 matches the tick