The "changedSince" query parameter does not work

[polidoro-so]

Hi, I am currently using the test environment to develop integration with Tripletex and it seems the changedSince field in the query parameters is ignored. Tested so far the endpoints for Customer and Supplier.

Testing with Postman or directly at https://api-test.tripletex.tech/v2-docs/ return all entity records.

GET https://api-test.tripletex.tech/v2/customer?changedSince=2030-09-09T18:00:00Z&fields=changes

Response: 
{
    "fullResultSize": 193,
    "from": 0,
    "count": 193,
    "versionDigest": "'If-None-Match' header not specified",
    "values": [
        {
            "changes": [
                {
                    "employeeId": 11889083,
                    "timestamp": "2025-03-12T15:09:57+01:00",
                    "changeType": "CREATE"
                },
                {
                    "employeeId": 11890724,
                    "timestamp": "2025-04-30T09:35:45+02:00",
                    "changeType": "UPDATE"
                }
            ]
        },
        {
            "changes": [
                {
                    "employeeId": 11889083,
                    "timestamp": "2025-03-12T15:09:57+01:00",
                    "changeType": "CREATE"
                }
            ]
        },
        {
            "changes": [
                {
                    "employeeId": 11889083,
                    "timestamp": "2025-03-12T15:09:57+01:00",
                    "changeType": "CREATE"
                }
            ]
        },
	...
    ]
}