fix(ai): 讓 PixelRAG VLM receipt 自證 artifact write

services/pixelrag_vlm_replay_worker_service.py

@@ -232,8 +232,11 @@ def _write_replay_receipt(
         / "vlm_replay_receipt.json"
     )
     target.parent.mkdir(parents=True, exist_ok=True)
+    receipt_payload = dict(worker_item)
+    receipt_payload["artifact_write_performed"] = True
+    receipt_payload["receipt_path"] = str(target)
     target.write_text(
-        json.dumps(worker_item, ensure_ascii=False, indent=2, sort_keys=True),
+        json.dumps(receipt_payload, ensure_ascii=False, indent=2, sort_keys=True),
         encoding="utf-8",
     )
     return str(target)