Log the GroupKey and alerts in retry

This commit updates notify.go to log the GroupKey and fingerprints
of an alert at the debug level, and just the GroupKey at the
warning level should the notify attempt fail.

notify/notify.go

@@ -710,7 +710,11 @@ func (r RetryStage) exec(ctx context.Context, l log.Logger, alerts ...*types.Ale
 		i    = 0
 		iErr error
 	)
+
 	l = log.With(l, "receiver", r.groupName, "integration", r.integration.String())
+	if groupKey, ok := GroupKey(ctx); ok {
+		l = log.With(l, "aggrGroup", groupKey)
+	}
 
 	for {
 		i++
@@ -745,10 +749,11 @@ func (r RetryStage) exec(ctx context.Context, l log.Logger, alerts ...*types.Ale
 				// integration upon context timeout.
 				iErr = err
 			} else {
-				lvl := level.Debug(l)
-				if i > 1 {
-					lvl = level.Info(l)
+				lvl := level.Info(l)
+				if i <= 1 {
+					lvl = level.Debug(log.With(l, "alerts", fmt.Sprintf("%v", alerts)))
 				}
+
 				lvl.Log("msg", "Notify success", "attempts", i)
 				return ctx, alerts, nil
 			}