fix: add PathBuf import and fix ? operator usage

src/modes/save.rs

@@ -7,6 +7,7 @@ use std::str::FromStr;
 use clap::error::ErrorKind;
 use clap::Command;
 use log::debug;
+use std::path::PathBuf;
 use rusqlite::Connection;
 
 use crate::db::{self};
@@ -152,7 +153,7 @@ pub fn mode_save(
 
         stdout.write_all(&buffer[..n])?;
         item_out.write_all(&buffer[..n])?;
-        digest_engine.update(&buffer[..n])?;
+        digest_engine.update(&buffer[..n]);
         item.size = match item.size {
             None => Some(n as i64),
             Some(prev_n) => Some(prev_n + n as i64),