Modified patch update to separetely process the meta field

[antoineludeau]

Context

The "meta" field is currently a JSONB type in the postgreSQL DB. When patching this field, the whole object is updated and we loose the data that was already present.

Enhancement

This PR aims to add a separate process of the meta field from the rest of the entity (address, common toponym or district) during a 'patch'. The meta field is know processed by adding the fields to the one already present in the DB.

Example :
we have a district in the DB with the following data :

{
    "id": "7d40ffcc-57e2-4621-a538-e3ef20b74b8e",
    "labels": [
        {
            "value": "Toulouse",
            "isoCode": "fra"
        }
    ],
    "updateDate": "2023-01-01T00:00:00.000Z",
    "config": null
    "meta": {
        "insee": {
            "cog": "31555"
        }
    }
}

We patch the district with the following body :

{
    "id": "7d40ffcc-57e2-4621-a538-e3ef20b74b8e",
    "meta": {
        "bal": {
            "idRevision": "65491ca60d6ed147e80ef260",
            "dateRevision": "2023-11-06T17:04:38.540Z"
        }
    }
}

The result in the DB would be :

{
    "id": "7d40ffcc-57e2-4621-a538-e3ef20b74b8e",
    "labels": [
        {
            "value": "Toulouse",
            "isoCode": "fra"
        }
    ],
    "updateDate": "2023-01-01T00:00:00.000Z",
    "config": null
    "meta": {
        "insee": {
            "cog": "31555"
        },
        "bal": {
            "idRevision": "65491ca60d6ed147e80ef260",
            "dateRevision": "2023-11-06T17:04:38.540Z"
        }
    }
}