feat(server): add tracing spans and caching to archive and blame services

- Add tracing spans with repo labels for archive and blame operations
- Implement caching for archive list entries when using OID selectors
- Implement caching for blame operations when using OID selectors
- Add detailed

tests/common/mod.rs

@@ -1,4 +1,12 @@
 use gitks::bare::GitBare;
+use gitks::server::GitksService;
+
+/// Create a GitksService with a temp directory as repo_prefix
+pub fn setup_service(dir: &std::path::Path) -> GitksService {
+    GitksService {
+        repo_prefix: dir.to_path_buf(),
+    }
+}
 
 pub fn run_git(work_dir: &std::path::Path, args: &[&str]) -> duct::Expression {
     duct::cmd("git", {
@@ -96,7 +104,7 @@ pub fn setup_bare_repo() -> (tempfile::TempDir, GitBare) {
     .run()
     .expect("set HEAD to main");
 
-    (dir, GitBare { bare_dir })
+    (dir, GitBare::new(bare_dir))
 }
 
 pub fn setup_bare_repo_with_conflict() -> (tempfile::TempDir, GitBare) {
@@ -163,5 +171,5 @@ pub fn setup_bare_repo_with_conflict() -> (tempfile::TempDir, GitBare) {
     .run()
     .expect("set HEAD to main");
 
-    (dir, GitBare { bare_dir })
+    (dir, GitBare::new(bare_dir))
 }