Why is there overlap? relating releases to their underlying code repository is both logical and provides improved trust heuristics. Obtainium is a good example of this. It would seem odd to have duplicated and disconnected release events, for the same app for app stores and code repositories.

It won't take much to relate application profile events to NIP-34 announcement events. There are a few ways it could be done. The beauty of nostr is that clients could make this connection front and centre or ignore it completely.