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

repository/raw_changes.rs

@@ -4,7 +4,10 @@ use crate::pb::*;
 
 impl GitBare {
     /// Get raw changes between two revisions (file-level changes only, no diff content).
-    pub fn get_raw_changes(&self, request: GetRawChangesRequest) -> GitResult<GetRawChangesResponse> {
+    pub fn get_raw_changes(
+        &self,
+        request: GetRawChangesRequest,
+    ) -> GitResult<GetRawChangesResponse> {
         crate::sanitize::validate_revision(&request.base)?;
         crate::sanitize::validate_revision(&request.head)?;
 
@@ -32,11 +35,15 @@ impl GitBare {
 
         for line in stdout.lines() {
             let line = line.trim();
-            if !line.starts_with(':') { continue; }
+            if !line.starts_with(':') {
+                continue;
+            }
             let line = &line[1..];
 
             let parts: Vec<&str> = line.split_whitespace().collect();
-            if parts.len() < 5 { continue; }
+            if parts.len() < 5 {
+                continue;
+            }
 
             let old_mode = u32::from_str_radix(parts[0], 8).unwrap_or(0);
             let new_mode = u32::from_str_radix(parts[1], 8).unwrap_or(0);
@@ -55,11 +62,14 @@ impl GitBare {
             };
 
             let (old_path, new_path) = if parts.len() >= 6 {
-                (parts[5].to_string(), if status_letter == 'R' || status_letter == 'C' {
-                    parts.get(6).map(|s| s.to_string()).unwrap_or_default()
-                } else {
-                    String::new()
-                })
+                (
+                    parts[5].to_string(),
+                    if status_letter == 'R' || status_letter == 'C' {
+                        parts.get(6).map(|s| s.to_string()).unwrap_or_default()
+                    } else {
+                        String::new()
+                    },
+                )
             } else {
                 (String::new(), String::new())
             };