change message format

msc/csst-msc-l1-mbi.json

 {
     "dag_id": "csst-msc-l1-mbi",
-    "parameters": {
-        "dag_run_id": 12345,
-        "message": {
-            "obsid": "10109300543790",
-            "chipid": "09"
-        }
+    "dag_run_id": "12345",
+    "message": {
+        "obsid": "10109300543790",
+        "chipid": "09"
     }
 }