[Feature request] Use the Requester user/mail from Nextcloud in the Docuware mail

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Feature request

Which Nextcloud Version are you currently using: (see administration page)
31.0.6

Is your feature request related to a problem? Please describe.
It would be nice if the requester of the Signature would be mentioned in the email that Docuware is sending.
Currently the main/dummy user in Docuware is always the requester for the Signature.

Current workflow:
Nextcloud user (user A) requests a signature from user (user B), Docuware sents an email with the following text: Company XYZ is requesting a signature.

Describe the solution you'd like
Requester of the signature to be the requester in the Docuware Mail.

Solution:
Nextcloud user (user A) requests a signature from user (user B), Docuware sents an email with the following text: User A is requesting a signature.

The issue names no files, tests, or entry points; start by tracing where the DocuSign email is created and how the Nextcloud requester is passed into that workflow. Verify the result against the two-user example so the DocuSign message identifies user A rather than the main or dummy user.