feat(cluster): implement Raft consensus with tracing and HTTP support

- Add Raft log and snapshot mechanisms for distributed consensus
- Integrate hyper HTTP server and client libraries for network communication
- Enhance tracing capabilities with structured logging and spans
- Add dependency tracking for new consensus-related crates
- Implement snapshot storage with serialization and persistence
- Add remote repository synchronization via Raft commands
- Include comprehensive tracing instrumentation across services

actor/mod.rs

@@ -1,15 +1,21 @@
 pub mod handler;
 pub mod message;
+pub mod raft_log;
 pub mod server;
+pub mod snapshot;
 pub mod sync;
 
 pub use handler::find_primary_in_cluster;
 pub use handler::{
-    GitNodeActor, GitNodeArgs, RepoEntry, broadcast_ref_update, broadcast_role_changed,
-    get_category_members, get_cluster_nodes, list_all_groups, route_group_for, start_node_actor,
+    broadcast_append_entries, broadcast_ref_update, broadcast_role_changed,
+    get_category_members, get_cluster_nodes, is_leader_lease_valid, list_all_groups,
+    renew_leader_lease, route_group_for, start_node_actor, GitNodeActor, GitNodeArgs, RepoEntry,
 };
 pub use message::{
-    ElectionRequest, ElectionResult, GitNodeMessage, NodeHealth, ROLE_PRIMARY, ROLE_REPLICA,
-    RefUpdateEvent, RepoActorMessage, RoleChangedEvent, RouteDecision,
+    AppendEntriesRequest, AppendEntriesResponse, ElectionRequest, ElectionResult,
+    GitNodeMessage, NodeHealth, ReadIndexRequest, ReadIndexResponse, RefUpdateEvent,
+    RepoActorMessage, RoleChangedEvent, RouteDecision, SerializedRaftEntry,
+    ROLE_PRIMARY, ROLE_REPLICA, RAFT_MSG_VERSION,
 };
+pub use raft_log::{Command as RaftCommand, LogEntry as RaftLogEntry, RaftLog};
 pub use server::init_actor_cluster;