🐛(summary) fix feature flag on summary job

Sadly, we used user db id as the posthog distinct id
of identified user, and not the sub.

Before this commit, we were only passing sub to the
summary microservice.

Add the owner's id. Please note we introduce a different
naming behavir, by prefixing the id with "owner". We didn't
for the sub and the email.

We cannot align sub and email with this new naming approach,
because external contributors have already started building
their own microservice.

src/backend/core/recording/event/notification.py

@@ -131,8 +131,8 @@ class NotificationService:
         if not owner_access:
             logger.error("No owner found for recording %s", recording.id)
             return False
-
         payload = {
+            "owner_id": str(owner_access.user.id),
             "filename": recording.key,
             "email": owner_access.user.email,
             "sub": owner_access.user.sub,