apply Read/Write/FlushOptions where available for future usage

Signed-off-by: strawberry <strawberry@puppygock.gay>

src/database/abstraction.rs

@@ -30,6 +30,7 @@ pub(crate) trait KeyValueDatabaseEngine: Send + Sync {
 pub(crate) trait KvTree: Send + Sync {
 	fn get(&self, key: &[u8]) -> Result<Option<Vec<u8>>>;
 
+	#[allow(dead_code)]
 	#[cfg(feature = "rocksdb")]
 	fn multi_get(
 		&self, iter: Vec<(&Arc<rust_rocksdb::BoundColumnFamily<'_>>, Vec<u8>)>,