update descriptions using LLM_descriptor tool

[janpansky]

I have enhanced the layout with descriptions. I used simple GET and PUT. It worked well. However there are some minor things I'd like to validate.

For example:
"filterContextRef": {
"identifier": {
"id": "a4283267-0531-4b78-8faf-77faa5288811",
"type": "filterContext"
}
},
Was not present when GET. Is it ok to keep it removed?
Also:
"sourceColumnDataTypes": [
"TIMESTAMP"
],
"sourceColumns": [
"return_date"

vs
"sources": [
{
"column": "return_date",
"dataType": "TIMESTAMP",
"target": {
"id": "return_date",
"type": "date"
}
}

The rest of the changes are mostly positional. Thanks for checking.