Refactor for structured insertions

Signed-off-by: Jason Volk <jason@zemos.net>

src/service/sending/dest.rs

@@ -12,7 +12,7 @@ pub enum Destination {
 
 #[implement(Destination)]
 #[must_use]
-pub fn get_prefix(&self) -> Vec<u8> {
+pub(super) fn get_prefix(&self) -> Vec<u8> {
 	match self {
 		Self::Normal(server) => {
 			let len = server.as_bytes().len().saturating_add(1);