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

actor/sync.rs

@@ -219,7 +219,9 @@ async fn sync_via_pack_service_to_file(
     temp_dir: &Path,
 ) -> Result<Option<PathBuf>, String> {
     use crate::pb::pack_service_client::PackServiceClient;
-    use crate::pb::{AdvertiseRefsRequest, PackObjectsOptions, PackObjectsRequest, RepositoryHeader};
+    use crate::pb::{
+        AdvertiseRefsRequest, PackObjectsOptions, PackObjectsRequest, RepositoryHeader,
+    };
     use tokio::io::AsyncWriteExt;
     use tokio_stream::StreamExt;
 
@@ -358,10 +360,7 @@ fn update_local_ref(repo_path: &Path, ref_name: &str, new_oid: &str) {
 
 /// Apply a committed Raft command to the local git repository.
 /// This is called on followers when they receive committed entries from the leader.
-pub fn apply_raft_command_to_repo(
-    repo_prefix: &Path,
-    command: &crate::actor::raft_log::Command,
-) {
+pub fn apply_raft_command_to_repo(repo_prefix: &Path, command: &crate::actor::raft_log::Command) {
     match command {
         crate::actor::raft_log::Command::RefUpdate {
             relative_path,