Insert deposit date into description when each version is published

[arcadiafalcone]

The problem: When a user does not enter a date in H2, no date is displayed in the metadata or indexed for the object.

The date of initial deposit should be entered into the descriptive metadata, both to record this information and to provide a fallback for discovery if the user does not enter a date. This date should not change when the object is versioned unless the user enters a publication date later.

The date of initial deposit should also be retained as the record creation date, and should not change if the object is versioned in future.

Example if deposit date is January 29, 2022 and the object was updated on January 31 and February 15; the user entered a publication date of November 30, 2021:

{
    "event": [
        {
            "type": "deposit",
            "date": [
                {
                    "type": "publication",
                    "value": "2022-01-29",
                    "encoding": {"code": "edtf"}
                }
            ]
        },
        {
            "type": "deposit",
            "date": [
                {
                    "type": "modification",
                    "value": "2022-01-31",
                    "encoding": {"code": "edtf"}
                }
            ]
        },
        {
            "type": "deposit",
            "date": [
                {
                    "type": "modification",
                    "value": "2022-02-15",
                    "encoding": {"code": "edtf"}
                }
            ]
        },
        {
            "type": "publication",
            "date": [
                {
                    "type": "publication",
                    "value": "2021-11-30",
                    "status": "primary",
                    "encoding": {"code": "edtf"}
                }
            ]
        }
    ],
    "adminMetadata": {
        "event": [
            {
                "type": "creation",
                "date": [
                    {
                        "value": "2022-01-29",
                        "encoding": {"code": "edtf"}
                    }
                ]
            }
        ]
    }
}

Dependent on sul-dlss/cocina-models#502 for mapping spec.

Implementation details:

• Create a new timestamp on each version that is set during the begin_deposit event
• List all of version timestamps as event type deposit, date type modification in Cocina (see mapping)
• List the first version's timestamp as event type deposit, date type publication (see mapping)
• Also add initial deposit date as record creation date in DescriptiveAdminMetadata