refactor(bare): enhance security and performance optimizations

- Remove unnecessary sorting in advertise_refs for deterministic output
- Add path traversal detection and validation in bare_dir construction
- Implement symlink resolution checks to prevent security vulnerabilities
- Refactor cache system with CRC validation and improved metrics
- Integrate repo-specific cache invalidation using indexed keys
- Add comprehensive unit tests for commit operations and diff functionality
- Move configuration constants to centralized config module
- Optimize string operations in disk cache random value generation
- Enhance license detection algorithm with cleaner matching logic
- Streamline argument processing in various git operations
- Update dependencies including crc32fast and flate2 for performance
- Add signal handling capability to tokio runtime configuration

refs/update_refs.rs

@@ -15,7 +15,7 @@ impl GitBare {
             if !update.old_oid.is_empty() {
                 crate::sanitize::validate_revision(&update.old_oid)?;
                 stdin_input.push_str(&format!(
-                    "update {} {}\0{}\n",
+                    "update {} {} {}\n",
                     update.ref_name, update.new_oid, update.old_oid
                 ));
             } else {
@@ -32,7 +32,6 @@ impl GitBare {
                 &self.bare_dir.to_string_lossy(),
                 "update-ref",
                 "--stdin",
-                "-z",
             ])
             .stdin(std::process::Stdio::piped())
             .stdout(std::process::Stdio::piped())