Fix clippy 1.97 useless_borrows_in_formatting lint

Rust 1.97's new clippy lint flags the redundant `&` on `self.offset`
in Entry's Debug impl. CI runs clippy with -D warnings in every job,
so this single pre-existing lint currently fails all PR pipelines.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/decoder/ifd.rs

@@ -363,7 +363,7 @@ impl ::std::fmt::Debug for Entry {
     fn fmt(&self, fmt: &mut ::std::fmt::Formatter) -> Result<(), ::std::fmt::Error> {
         fmt.write_str(&format!(
             "Entry {{ type_: {:?}, count: {:?}, offset: {:?} }}",
-            self.type_, self.count, &self.offset
+            self.type_, self.count, self.offset
         ))
     }
 }