registry: claim EXP_008

repro_clean_s42_v1/registry/experiments.json

@@ -185,11 +185,11 @@
       "updated_at": "2026-10-05T08:48:53Z"
     },
     "EXP_008": {
-      "claimed_by": null,
+      "claimed_by": "kaggle-worker-11",
       "config_hash": "a3173a5f068d",
       "created_at": "2026-10-05T08:48:56Z",
       "exp_id": "EXP_008",
-      "heartbeat": null,
+      "heartbeat": 1791190137.0983403,
       "init_from": "qacp",
       "key": "full:davidnet:s7",
       "mode": "full",
@@ -197,9 +197,9 @@
       "seed": 7,
       "split": "strict",
       "stage": "stage1",
-      "status": "registered",
+      "status": "running",
       "tag": "neg_control",
-      "updated_at": "2026-10-05T08:48:56Z"
+      "updated_at": "2026-10-05T08:48:57Z"
     }
   },
   "next_id": 9