refactor(actor): implement Raft consensus algorithm for cluster leader election

- Add voting mechanism with term tracking and vote persistence
- Implement election triggering logic with majority vote counting
- Add primary/replica role transition handling with state management
- Integrate health check failure detection for automatic elections
- Refactor actor messaging system for distributed coordination
- Update repository registration to query cluster for existing primary
- Add broadcast mechanism for role change notifications
- Implement proper term comparison and duplicate request filtering
- Upgrade dependency versions including tokio-util for async utilities
- Optimize code formatting and line wrapping for improved readability
- Remove redundant blank lines and improve code structure consistency
- Enhance error logging and trace information for debugging purposes

diff/changed_paths.rs

@@ -4,7 +4,10 @@ use crate::pb::*;
 
 impl GitBare {
     /// Find changed paths between two revisions (no diff content).
-    pub fn find_changed_paths(&self, request: FindChangedPathsRequest) -> GitResult<FindChangedPathsResponse> {
+    pub fn find_changed_paths(
+        &self,
+        request: FindChangedPathsRequest,
+    ) -> GitResult<FindChangedPathsResponse> {
         crate::sanitize::validate_revision(&request.base)?;
         crate::sanitize::validate_revision(&request.head)?;
 
@@ -41,21 +44,49 @@ impl GitBare {
 
         for line in stdout.lines() {
             let line = line.trim();
-            if line.is_empty() { continue; }
+            if line.is_empty() {
+                continue;
+            }
 
             let parts: Vec<&str> = line.split('\t').collect();
-            if parts.is_empty() { continue; }
+            if parts.is_empty() {
+                continue;
+            }
 
             let status_str = parts[0];
             let status_letter = status_str.chars().next().unwrap_or('M');
 
             let (status, old_path, new_path) = match status_letter {
-                'A' => (changed_path::Status::ChangedPathStatusAdded as i32, String::new(), parts.get(1).cloned().unwrap_or_default().to_string()),
-                'D' => (changed_path::Status::ChangedPathStatusDeleted as i32, parts.get(1).cloned().unwrap_or_default().to_string(), String::new()),
-                'R' => (changed_path::Status::ChangedPathStatusRenamed as i32, parts.get(1).cloned().unwrap_or_default().to_string(), parts.get(2).cloned().unwrap_or_default().to_string()),
-                'C' => (changed_path::Status::ChangedPathStatusCopied as i32, parts.get(1).cloned().unwrap_or_default().to_string(), parts.get(2).cloned().unwrap_or_default().to_string()),
-                'T' => (changed_path::Status::ChangedPathStatusTypeChanged as i32, String::new(), parts.get(1).cloned().unwrap_or_default().to_string()),
-                _ => (changed_path::Status::ChangedPathStatusModified as i32, String::new(), parts.get(1).cloned().unwrap_or_default().to_string()),
+                'A' => (
+                    changed_path::Status::ChangedPathStatusAdded as i32,
+                    String::new(),
+                    parts.get(1).cloned().unwrap_or_default().to_string(),
+                ),
+                'D' => (
+                    changed_path::Status::ChangedPathStatusDeleted as i32,
+                    parts.get(1).cloned().unwrap_or_default().to_string(),
+                    String::new(),
+                ),
+                'R' => (
+                    changed_path::Status::ChangedPathStatusRenamed as i32,
+                    parts.get(1).cloned().unwrap_or_default().to_string(),
+                    parts.get(2).cloned().unwrap_or_default().to_string(),
+                ),
+                'C' => (
+                    changed_path::Status::ChangedPathStatusCopied as i32,
+                    parts.get(1).cloned().unwrap_or_default().to_string(),
+                    parts.get(2).cloned().unwrap_or_default().to_string(),
+                ),
+                'T' => (
+                    changed_path::Status::ChangedPathStatusTypeChanged as i32,
+                    String::new(),
+                    parts.get(1).cloned().unwrap_or_default().to_string(),
+                ),
+                _ => (
+                    changed_path::Status::ChangedPathStatusModified as i32,
+                    String::new(),
+                    parts.get(1).cloned().unwrap_or_default().to_string(),
+                ),
             };
 
             paths.push(ChangedPath {