Manage annotations properly after versioning and blob update

When the main blob is updated in a document, existing annotations might not be relevant to the new blob.

AC

• When a blob is replaced, existing annotations associated to this property are removed from the live document
  • annotations related to another property are kept
  • note: an automatic versioning can be created to create a version to which the existing annotations will be tied, see https://doc.nuxeo.com/nxdoc/versioning/#automatic-versioning-system

• When a version is created, annotations associated to all properties are removed from the live document
  • annotations are kept on the archived version

• When a version is viewed or restored, annotations for that given version are visible

//TODO consider what happens for scenarios where the annotation could be a stamp, e.g. "confidential": typically a confidential document remains as such between versions => should we manage them differently? do we have an alternate solution? is this really a problem?