Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: mphemming

aodn_cloud_optimised/config/dataset/mooring_estuarine_coastal_water_quality_monitoring_realtime_qc.json

@@ -44,6 +44,11 @@
   },
   "metadata_uuid": "a8f5c736-6eaa-47fb-a9eb-d778beb71701",
   "schema": {
+    "index": {
+      "type": "int64",
+      "units": "1",
+      "long_name": "Row index"
+    },
     "TEMP": {
       "type": "float",
       "ancillary_variables": "TEMP_quality_control",