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

lib.rs

@@ -15,14 +15,14 @@ pub mod macros;
 pub mod merge;
 pub mod metrics;
 pub mod oid;
-pub mod rate_limit;
-pub mod remote;
-pub mod repository;
 pub mod pack;
 pub mod pack_cache;
 pub mod paginate;
 pub mod pb;
+pub mod rate_limit;
 pub mod refs;
+pub mod remote;
+pub mod repository;
 pub mod sanitize;
 pub mod server;
 pub mod snapshot;