Reorganize artifacts by model and harness

models/minimax-m3.json

@@ -1,9 +1,10 @@
 {
   "label": "MiniMax M3",
   "vendor": "MiniMax",
-  "order": 110,
   "harness": "MiniMax Code Web",
   "effort": "Thinking",
+  "artifactDir": "minimax-m3/minimax-code-web-thinking",
+  "order": 110,
   "runs": {
     "pelican-cycling": {
       "note": {