support sharing eCMRs between different instances

Related issues

Add origin information as a String to EcmrData Add version bump to 0.3.0 as we add a new feature

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:

• Documentation

Proposed squash commit message

Add origin information as a String to EcmrData
Add version bump to 0.3.0 as we add a new feature

Co-authored-by: Marcus Schröer <marcus.schroeer@iml.fraunhofer.de>, Niklas Burcyk <niklas.burcyk@iml.fraunhofer.de>