[BUG] DateTime format broken

[chbo-ml]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Send a PUT request for a submodel containing a Property with Datatype DateTime e.g. {
   "idShort": "Date",
   "valueType": "xs:dateTime",
   "value": "22026-03-21T13:13:35.485Z",
   "modelType": "Property"
   },
2. Retrieve the saved Value: {"idShort":"Date","modelType":"Property","value":"2026-03-21 13:13:35.485+00","valueType":"xs:dateTime"}

Expected behavior
Retrieve the saved Value should return the date back in ISO-Format.: {"idShort":"Date","modelType":"Property","value":"22026-03-21T13:13:35.485","valueType":"xs:dateTime"} as stored. Especially because storing a non-ISO formatted date time is not allowed.

BaSyx (please complete the following information):

• BaSyx Version eclipsebasyx/submodelrepository-go:1.0.0

[aaronzi]

Thanks for reporting this bug. We are on it