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/find_merge_base.rs

@@ -4,7 +4,10 @@ use crate::pb::*;
 
 impl GitBare {
     /// Find the best merge base for a set of revisions (OIDs).
-    pub fn find_merge_base(&self, request: FindMergeBaseRequest) -> GitResult<FindMergeBaseResponse> {
+    pub fn find_merge_base(
+        &self,
+        request: FindMergeBaseRequest,
+    ) -> GitResult<FindMergeBaseResponse> {
         if request.revisions.is_empty() {
             return Ok(FindMergeBaseResponse::default());
         }
@@ -49,7 +52,10 @@ impl GitBare {
     }
 
     /// Check if one commit is an ancestor of another.
-    pub fn commit_is_ancestor(&self, request: CommitIsAncestorRequest) -> GitResult<CommitIsAncestorResponse> {
+    pub fn commit_is_ancestor(
+        &self,
+        request: CommitIsAncestorRequest,
+    ) -> GitResult<CommitIsAncestorResponse> {
         crate::sanitize::validate_revision(&request.ancestor_oid)?;
         crate::sanitize::validate_revision(&request.descendant_oid)?;
 
@@ -68,6 +74,8 @@ impl GitBare {
             .map(|s| s.success())
             .unwrap_or(false);
 
-        Ok(CommitIsAncestorResponse { is_ancestor: result })
+        Ok(CommitIsAncestorResponse {
+            is_ancestor: result,
+        })
     }
 }