Event Discovery: EventType Autocreate on replies to subscriptions should reference the subscription

[Cali0707]

Problem To indicate that eventtypes occur in replies, we should have them reference the subscription instead of the channel.

Persona: Which persona is this feature for?

Exit Criteria A rekt test that shows that reply events to a subscription have the autocreated event reference the subscription, not the channel

Time Estimate (optional): How many developer-days do you think this may take to resolve?

Additional context (optional) Add any other context about the feature request here.

[Cali0707]

/triage accepted

[Cali0707]

/assign