Tighten prompt_template_source.notes: explicit 5-tier classification per 2026-06-01 priority rules

metadata.json

@@ -55,7 +55,7 @@
       "prompt_template_source": {
         "origin": "official",
         "reference": "https://github.com/EvolvingLMMs-Lab/lmms-eval/blob/main/lmms_eval/tasks/seedbench/utils.py (seedbench_doc_to_text — 'A. choice_a\\nB. choice_b\\nC. choice_c\\nD. choice_d\\nAnswer with the option's letter from the given choices directly.')",
-        "notes": "lmms-eval SEEDBench canonical evaluation prompt (direct choice_a/b/c/d fields)."
+        "notes": "Tier 4: lmms-eval SEEDBench canonical evaluation prompt (direct choice_a/b/c/d fields)."
       }
     }
   }