* Expose IntoDisk and FromDisk in zebra-state
* Implement database serialization for SaplingScanningKey Strings
* Implement serialization for Vec<SaplingScannedResult> (Vec<transaction::Hash>)
* Implement seralization for SaplingScannedDatabaseIndex
* Add an is_empty() method
* Add a read method for a specific index, and document it
* Implement writing scanner results to the database
* Make read name more explicit
* Implement writing scanner keys
* Implement reading sapling keys
* Spawn blocking tasks correctly in async code
* Change storage results methods to use the database
* Update tests that use storage
* Use spawn_blocking() for database methods
* Change the check interval to slightly less than the block interval
* Expose raw database methods with shielded-scan
* fix `scan_task_starts` test
* minor doc change in test
---------
Co-authored-by: Alfredo Garcia <oxarbitrage@gmail.com>
* Create an empty storage/db module
* Use ephemeral storage in tests
* Populate storage inside new() method
* Move scanner setup into an init() method
* Pass the network to scanner init
* Create a database but don't actually use it
* Skip shutdown format checks when skipping format upgrades
* Allow the scanner to skip launching format upgrades in production
* Refactor skipping format upgrades so it is consistent
* Allow checking configs for equality
* Restore Network import
teor