"required": ["email", "orcid"] in user_description may be disfunctional

Currently this is the contact definition in user_description.json

```
"contact": {
"type": "array",
"items": {
"oneOf": [
{
"required": [
"email", "orcid"
],
"title": "Email",
"type": "object",
"properties": {
"email": {
"type": "string",
"description": "(Optional) - Email Address"
}
}
},
{
"title": "ORCID",
"type": "object",
"properties": {
"orcid": {
"type": "string",
"description": "(Optional) - ORCID URL",
"pattern": "^https://orcid\\.org/[0-9]{4}-[0-9]{4}-[0-9]{4}-[0-9]{3}[X0-9]{1}$"
}
}
}
]
}
}
```

It looks like the following json files are valid:

```
{
"userName": "Peter",
"role": "Team Leader"
}
```

```
{
"userName": "Peter",
"role": "Team Leader",
"contact": [
]
}
```

```
{
"userName": "Peter",
"role": "Team Leader",
"contact": [
{"email": "some@thing.com"}
]
}
```

```
{
"userName": "Peter",
"role": "Team Leader",
"contact": [
{"orcid": "https://orcid.org/0000-0002-1825-0097"}
]
}
```

```
{
"userName": "Peter",
"role": "Team Leader",
"contact": [
{"email": "some@thing.com"},
{"orcid": "https://orcid.org/0000-0002-1825-0097"}
]
}
```

```
{
"userName": "Peter",
"role": "Team Leader",
"contact": [
{"orcid": "https://orcid.org/0000-0002-1825-0097"},
{}
]
}
```

invalid:

```
{
"userName": "Peter",
"role": "Team Leader",
"contact": [
{"email": "some@thing.com", "orcid": "https://orcid.org/0000-0002-1825-0097"}
]
}
```

I am not exactly sure what the intention behind the required statement is. In case it should disallow an empty contact array (which I would find reasonable) or a contact array with an empty element, or even a missing contact, it fails to do so

Start with user_description.json and inspect the contact schema against the valid and invalid examples in the issue. Clarify which contact-array and object cases are intended to pass or fail, then update the schema so validation matches that decision and recheck every listed example.

Written by the indexing model from the issue text.