fix(bpdm-gate): added missing value for externalSequenceTimestamp attribute in response

[SujitMBRDI]

Description

This pull request adds missing value for externalSequenceTimestamp attribute in Gate input response.

Fixes #1245

Pre-review checks

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• DEPENDENCIES are up-to-date. Dash license tool. Committers can open IP issues for restricted libs.
• Copyright and license header are present on all affected files

[nicoprow]

Used the example of the linked issue to verify whether it works:

Gate PUT input/business-partners:

[
    {
        "externalId": "legalAddress_Vapiano_25.02.",
        "nameParts": [
            "VAP Marketing GmbH"
        ],
        "identifiers": [
            {
                "type": "DE_BNUM",
                "value": "Hildesheim HRB 207336"
            }
        ],
        "legalEntity": {
            "legalEntityBpn": null,
            "legalName": "VAP Marketing GmbH",
            "shortName": null,
            "legalForm": null
        },
        "site": {
            "siteBpn": null,
            "name": null
        },
        "address": {
            "addressType": "LegalAddress",
            "physicalPostalAddress": {
                "administrativeAreaLevel1": null,
                "city": "Hildesheim",
                "country": "DE",
                "industrialZone": null,
                "postalCode": "31135",
                "street": {
                    "houseNumber": "6",
                    "name": "Frankenstraße"
                }
            }
        },
        "externalSequenceTimestamp": "2025-02-25T14:13:46.550Z",
        "isOwnCompanyData": false
    }
]

response shows externalSequenceTimestamp successfully returned

[nicoprow]

Sorry, I have to redact the approval. Let's create a Changelog entry as well :)

[nicoprow]

Omg, back to approval again. I just noticed this belongs to the new sig-release feature eclipse-tractusx/sig-release#726 and therefore will not need a separate fix entry (as the introduction of the externalSequenceTimestamp is already covered in the Changelog).

[SujitMBRDI]

Omg, back to approval again. I just noticed this belongs to the new sig-release feature eclipse-tractusx/sig-release#726 and therefore will not need a separate fix entry (as the introduction of the externalSequenceTimestamp is already covered in the Changelog).

Hello @nicoprow, yes feature is not released yet. The reason why i haven't added changelog entry for bug observed.
I think this i good to merge.