Feature/display 1080 relations modified at

[turegjorup]

Link to ticket

https://jira.itkdev.dk/browse/DISPLAY-1080

Description

Adds a relationsModified field to API responses to allow clients to know when to traverse down the relationship tree. Implemented with a doctrine listener that performs native SQL UPDATE queries.

"relationsModified": {
    "layout": "2024-01-02T11:49:11.000Z",
    "inScreenGroups": "2024-01-02T11:49:05.000Z"
}

Screenshot of the result

Checklist

• My code is covered by test cases.
• My code passes our test (all our tests).
• My code passes our static analysis suite.
• My code passes our continuous integration process.

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should be exempt from the list.

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