Implement retrieval_test in GO (#14231)

### What problem does this PR solve?

Implement retrieval_test in GO

### Type of change

- [x] Refactoring

api/apps/chunk_app.py

@@ -157,6 +157,7 @@ async def retrieval_test():
             if ck["content_with_weight"]:
                 ranks["chunks"].insert(0, ck)
         ranks["chunks"] = settings.retriever.retrieval_by_children(ranks["chunks"], tenant_ids)
+        ranks["total"] = len(ranks["chunks"])
 
         for c in ranks["chunks"]:
             c.pop("vector", None)