feat: Prevent empty reply objects to have properties (planning#1293)

Christoph Metzgerrequested to merge
1293-improve-reply-events into main

Events with empty objects - example delete-reply - should have no other properties.

I validated it with an Online JSON Schema Validator:

IS: MicrosoftTeams-image__4_

SHOULD: MicrosoftTeams-image__3_

Merge request reports