Fix rounding of Long values

Steps to reproduce :

1. define a field "stop_timestamp" of type Integer
2. create a document and set the property "stop_timestamp" to 1668176372345619999
3. observe that the view panel display this property with the value 1668176372345620000
4. click on the Edit button and observe that the field "stop_timestamp" also contains 1668176372345620000 instead of 1668176372345619999
5. running a REST call to fetch the document returns the same value

   "properties": {
   "sch_recording:stop_timestamp": 1668176372345620000
   },
   

Expected result: the REST call (and the UI) displays the entered value = 1668176372345619999