fix: show RDG flap badge on 302 and 303 events in SAC UI (0.20.5)

Seaca surfaced flap via Problems; the web UI only flagged 303 in DB and had
no visible label. Resolve flap pairs at read time and show badge plus qwinsta
on both sides of 302→303.

backend/app/api/v1/dashboards.py

@@ -25,7 +25,7 @@ def fetch_recent_events(db: Session, *, limit: int = 8) -> list[EventSummary]:
         .order_by(Event.received_at.desc())
         .limit(limit)
     ).all()
-    return [event_to_summary(e) for e in rows]
+    return [event_to_summary(e, db) for e in rows]
 
 
 class TopHostItem(BaseModel):