Update sentry reporting (#3305)

This hopefully reduces the garbage we currently produce.
(Using [GlitchTip](https://glitchtip.com/) on my personal instance, this
seems to look better)

roomserver/internal/input/input.go

@@ -108,12 +108,14 @@ type worker struct {
 	r            *Inputer
 	roomID       string
 	subscription *nats.Subscription
+	sentryHub    *sentry.Hub
 }
 
 func (r *Inputer) startWorkerForRoom(roomID string) {
 	v, loaded := r.workers.LoadOrStore(roomID, &worker{
-		r:      r,
-		roomID: roomID,
+		r:         r,
+		roomID:    roomID,
+		sentryHub: sentry.CurrentHub().Clone(),
 	})
 	w := v.(*worker)
 	w.Lock()
@@ -265,9 +267,9 @@ func (w *worker) _next() {
 	// Look up what the next event is that's waiting to be processed.
 	ctx, cancel := context.WithTimeout(w.r.ProcessContext.Context(), time.Minute)
 	defer cancel()
-	if scope := sentry.CurrentHub().Scope(); scope != nil {
+	w.sentryHub.ConfigureScope(func(scope *sentry.Scope) {
 		scope.SetTag("room_id", w.roomID)
-	}
+	})
 	msgs, err := w.subscription.Fetch(1, nats.Context(ctx))
 	switch err {
 	case nil:
@@ -323,9 +325,9 @@ func (w *worker) _next() {
 		return
 	}
 
-	if scope := sentry.CurrentHub().Scope(); scope != nil {
+	w.sentryHub.ConfigureScope(func(scope *sentry.Scope) {
 		scope.SetTag("event_id", inputRoomEvent.Event.EventID())
-	}
+	})
 
 	// Process the room event. If something goes wrong then we'll tell
 	// NATS to terminate the message. We'll store the error result as
@@ -347,7 +349,7 @@ func (w *worker) _next() {
 			}).Warn("Roomserver rejected event")
 		default:
 			if !errors.Is(err, context.DeadlineExceeded) && !errors.Is(err, context.Canceled) {
-				sentry.CaptureException(err)
+				w.sentryHub.CaptureException(err)
 			}
 			logrus.WithError(err).WithFields(logrus.Fields{
 				"room_id":  w.roomID,