fix(eventstore): use decimal, correct mirror (#9916)

# Eventstore fixes

- `event.Position` used float64 before which can lead to [precision
loss](https://github.com/golang/go/issues/47300). The type got replaced
by [a type without precision
loss](https://github.com/jackc/pgx-shopspring-decimal)
- the handler reported the wrong error if the current state was updated
and therefore took longer to retry failed events.

# Mirror fixes

- max age of auth requests can be configured to speed up copying data
from `auth.auth_requests` table. Auth requests last updated before the
set age will be ignored. Default is 1 month
- notification projections are skipped because notifications should be
sent by the source system. The projections are set to the latest
position
- ensure that mirror can be executed multiple times

internal/notification/projections.go

@@ -71,6 +71,26 @@ func Start(ctx context.Context) {
 	}
 }
 
+func SetCurrentState(ctx context.Context, es *eventstore.Eventstore) error {
+	if len(projections) == 0 {
+		return nil
+	}
+	position, err := es.LatestPosition(ctx, eventstore.NewSearchQueryBuilder(eventstore.ColumnsMaxPosition).InstanceID(authz.GetInstance(ctx).InstanceID()).OrderDesc().Limit(1))
+	if err != nil {
+		return err
+	}
+
+	for i, projection := range projections {
+		logging.WithFields("name", projection.ProjectionName(), "instance", authz.GetInstance(ctx).InstanceID(), "index", fmt.Sprintf("%d/%d", i, len(projections))).Info("set current state of notification projection")
+		_, err = projection.Trigger(ctx, handler.WithMinPosition(position))
+		if err != nil {
+			return err
+		}
+		logging.WithFields("name", projection.ProjectionName(), "instance", authz.GetInstance(ctx).InstanceID(), "index", fmt.Sprintf("%d/%d", i, len(projections))).Info("current state of notification projection set")
+	}
+	return nil
+}
+
 func ProjectInstance(ctx context.Context) error {
 	for i, projection := range projections {
 		logging.WithFields("name", projection.ProjectionName(), "instance", authz.GetInstance(ctx).InstanceID(), "index", fmt.Sprintf("%d/%d", i, len(projections))).Info("starting notification projection")