refactor(build): reformat code and add tonic health dependency

- Reformatted build script with proper indentation and line breaks
- Added tonic-health dependency to Cargo.toml and updated lock file
- Improved error handling in disk cache with concurrent deletion checks
- Refactored conditional chains using && and let expressions
- Reformatted struct initialization and function parameter lists
- Added proper spacing and alignment in language stats processing
- Improved assertion formatting in test cases
- Reorganized import statements and code layout in multiple files
- Updated metrics functions with better parameter handling and formatting

refs/find_refs.rs

@@ -69,7 +69,7 @@ impl GitBare {
         // Sort direction
         let sort_prefix = match SortDirection::try_from(request.sort_direction) {
             Ok(SortDirection::Asc) => "",
-            Ok(SortDirection::Desc) | _ => "-",
+            _ => "-",
         };
         args.push(format!("--sort={sort_prefix}refname"));