Draft: Resolve "eSeal Integration"

Related issues

Acceptance criteria

• Implemented code changes don't diverge from the related issue.
• Documentation reflects the status quo after merge.
• Version number is incremented according to SemVer. (Snapshot versions are not merged/released.)
• Only released versions of dependencies are used (i.e. no snapshot versions).
• Pipeline still works.
• GitLab issue is up-to-date.

If necessary, the following sections have been updated:

• Swagger
• Readme.md
• Documentation

Proposed squash commit message

A short one-line summary (max. 50 characters)

* A more detailed explanation of the changes introduced by this merge
  request.
* Each line should not exceed 72 characters.

Co-authored-by: NAME <EMAIL>

Closes #74