NewInMemory creates a new in-memory database.

NewPersistent creates a new persistent database instance using the provided data directory.

BadgerLogger is a wrapper type to give our logger the expected interface.

CommitTimestamp represents the sqlite table used to track the current commit timestamp.

InMemoryDatabase stores all data in memory.

PersistentDatabase stores its data on disk, providing persistence across restarts.

Txn is a wrapper around the transaction objects for the underlying DB engines.