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/integration.rs

@@ -95,12 +95,7 @@ fn setup_bare_repo() -> (tempfile::TempDir, GitBare) {
         &["push", "-f", "origin", "refs/tags/v0.1.0:refs/tags/v0.1.0"],
     );
 
-    (
-        dir,
-        GitBare {
-            bare_dir: bare_dir.clone(),
-        },
-    )
+    (dir, GitBare::new(bare_dir.clone()))
 }
 
 #[test]