Move id format check from server into notmuch

notmuch/src/lib.rs

@@ -598,6 +598,11 @@ impl Notmuch {
 
     #[instrument(skip_all, fields(id=id,part=part))]
     pub fn show_original_part(&self, id: &MessageId, part: usize) -> Result<Vec<u8>, NotmuchError> {
+        let id = if id.starts_with("id:") {
+            id
+        } else {
+            &format!("id:{id}")
+        };
         let res = self.run_notmuch(["show", "--part", &part.to_string(), id])?;
         Ok(res)
     }