refactor: apply clippy auto-fixes (162 warnings resolved)

- Fix needless borrows and references
- Collapse nested if statements
- Replace manual strip_prefix with str::strip_prefix()
- Remove redundant closures in map/unwrap_or_else
- Use Iterator::next_back() instead of rev().next()
- Simplify map_or patterns
- Use std::io::Error::other() instead of new(ErrorKind::Other, ..)
- Use div_ceil() instead of manual ceiling division
- Consolidate format! string arguments
- Various other idiomatic Rust improvements

39 files changed, 220 insertions(+), 320 deletions(-)

src/application/ports/outbound.rs

@@ -75,7 +75,7 @@ pub trait IdMappingPort: Send + Sync + 'static {
     
     /// Updates a file's path
     async fn update_file_path(&self, file_id: &str, new_path: &PathBuf) -> Result<(), DomainError> {
-        let storage_path = StoragePath::from_string(&new_path.to_string_lossy().to_string());
+        let storage_path = StoragePath::from_string(new_path.to_string_lossy().as_ref());
         self.update_path(file_id, &storage_path).await
     }
 }