[BUG] File data remaining in MongoDB after AAS deletion

[ChristophRh]

Description
When uploading an AAS (containing Submodels containing File Submodel Elements) via the BaSyx Web UI and subsequently deleting it all, the documents remain in the MongoDB fs.files and fs.chunks collections. The AAS is correctly removed from the registry and repository, but the corresponding files are not cleaned up.

To Reproduce

1. Start BaSyx Java off-the-shelf components using Docker Compose with a MongoDB backend and Port-Mapping '27017:27017'
2. Open the BaSyx Web UI
3. Upload an AAS (.aasx package) with a Submodel that contains some files in Submodel Element File
4. Delete the same AAS and all of its Submodels via the Web UI
5. Connect to the MongoDB instance (e.g. using MongoDB Compass)
6. Inspect the fs.files and fs.chunks collections in aas-env database

Expected behavior
After deleting an AAS and its Submodels, all associated data should be removed from MongoDB.

[aaronzi]

Thanks for reporting this. We will investigate that bug.