refactor(server): replace custom remote clients with macro-based implementation

- Replaced manual remote client functions with remote_client! macro for archive, blame, branch, commit, and diff services
- Simplified remote client creation logic using declarative macro approach
- Maintained same functionality while reducing code duplication across services

security(bare): enhance path traversal protection with comprehensive validation

- Added early relative_path validation to prevent path traversal attacks
- Implemented unified path validation to avoid TOCTOU race conditions
- Enhanced canonicalization checks for both existing and non-existent paths
- Added detailed logging for path traversal detection attempts

feat(cache): migrate from CLruCache to Moka with TTL and invalidation support

- Replaced clru dependency with moka for improved caching capabilities
- Added 300-second time-to-live for cache entries
- Implemented repository-specific cache invalidation mechanism
- Enhanced cache operations with thread-safe async support

refactor(commit): improve security validation for commit operations

- Added ref name validation to prevent command injection in cherry_pick_commit
- Implemented revision validation for commit selectors
- Added comprehensive input validation for create_commit parameters
- Enhanced file path validation to prevent traversal

merge/do_merge.rs

@@ -5,9 +5,13 @@ use crate::pb::{MergeRequest, MergeResult, merge_result};
 impl GitBare {
     pub fn merge(&self, request: MergeRequest) -> GitResult<MergeResult> {
         let target_branch = request.target_branch.clone();
+        crate::sanitize::validate_ref_name(&target_branch)?;
         let source_revision = match request.source.and_then(|s| s.selector) {
             Some(crate::pb::object_selector::Selector::Oid(oid)) => oid.hex.clone(),
-            Some(crate::pb::object_selector::Selector::Revision(name)) => name.revision.clone(),
+            Some(crate::pb::object_selector::Selector::Revision(name)) => {
+                crate::sanitize::validate_revision(&name.revision)?;
+                name.revision.clone()
+            }
             None => return Err(GitError::InvalidArgument("source is required".into())),
         };
         tracing::info!(