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

tree/find_files.rs

@@ -4,12 +4,10 @@ use crate::paginate;
 use crate::pb::{
     FileMetadata, FindFilesRequest, FindFilesResponse, ListTreeRequest, ObjectType, tree_entry,
 };
-use crate::tree;
 
 impl GitBare {
     pub fn find_files(&self, request: FindFilesRequest) -> GitResult<FindFilesResponse> {
         let revision = request.revision.clone();
-        let rev = tree::resolve_revision(&revision);
         let root = if request.pathspec.is_empty() {
             vec![String::new()]
         } else {
@@ -37,17 +35,17 @@ impl GitBare {
                     tree_entry::EntryType::TreeEntryTypeUnspecified => ObjectType::Unspecified,
                     _ => ObjectType::Blob,
                 } as i32;
-                let entry_path = entry.path.clone();
-                let rc = tree::recent_commit(self, &rev, &entry_path);
+                // recent_commit is NOT computed here to avoid N subprocess calls.
+                // Use get_file_metadata for per-file commit info.
                 files.push(FileMetadata {
-                    path: entry_path,
+                    path: entry.path,
                     oid: entry.oid,
                     mode: entry.mode,
                     size: entry.size,
                     r#type: object_type,
                     binary: false,
                     is_lfs: false,
-                    recent_commit: rc,
+                    recent_commit: None,
                 });
             }
         }