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/search_files.rs

@@ -4,17 +4,28 @@ use crate::pb::*;
 
 impl GitBare {
     /// Search file contents with a regex pattern.
-    pub fn search_files_by_content(&self, request: SearchFilesByContentRequest) -> GitResult<SearchFilesByContentResponse> {
+    pub fn search_files_by_content(
+        &self,
+        request: SearchFilesByContentRequest,
+    ) -> GitResult<SearchFilesByContentResponse> {
         crate::sanitize::validate_revision(&request.revision)?;
 
-        let revision = if request.revision.is_empty() { "HEAD" } else { &request.revision };
-        let max_results = if request.max_results == 0 { 100 } else { request.max_results };
+        let revision = if request.revision.is_empty() {
+            "HEAD"
+        } else {
+            &request.revision
+        };
+        let max_results = if request.max_results == 0 {
+            100
+        } else {
+            request.max_results
+        };
 
         let mut args = vec![
             "--git-dir".to_string(),
             self.bare_dir.to_string_lossy().into_owned(),
             "grep".to_string(),
-            "-I".to_string(),       // don't match binary files
+            "-I".to_string(), // don't match binary files
             "--line-number".to_string(),
             "--column".to_string(),
         ];
@@ -62,11 +73,22 @@ impl GitBare {
     }
 
     /// Search file names matching a pattern.
-    pub fn search_files_by_name(&self, request: SearchFilesByNameRequest) -> GitResult<SearchFilesByNameResponse> {
-        let revision = if request.revision.is_empty() { "HEAD" } else { &request.revision };
+    pub fn search_files_by_name(
+        &self,
+        request: SearchFilesByNameRequest,
+    ) -> GitResult<SearchFilesByNameResponse> {
+        let revision = if request.revision.is_empty() {
+            "HEAD"
+        } else {
+            &request.revision
+        };
         crate::sanitize::validate_revision(revision)?;
 
-        let max_results = if request.max_results == 0 { 100 } else { request.max_results };
+        let max_results = if request.max_results == 0 {
+            100
+        } else {
+            request.max_results
+        };
 
         let mut args = vec![
             "--git-dir".to_string(),