pub const STATE_HISTORY: &str = "state_history";Expand description
State-history journal column family: [u8; 8] => Vec<u8>
- [
u8; 8] =block_number.to_be_bytes()(big-endian so lex order == numeric order) Vec<u8>=JournalEntry::encode()
Stores one reverse-diff entry per committed block that is not yet final, enabling
reorgs deeper than the in-memory TrieLayerCache. Pruned at finality.