influxdb: report total checkins rather than windows

	my $now    = DateTime->now( time_zone => 'Europe/Berlin' );

	my $active = $now->clone->subtract( months => 1 );

	my $checkin_window_query

	  = qq{select count(*) as count from journeys where checkin_time > to_timestamp(?);};

	# DateTime's  math does not like time zones: When subtracting 7 days from

	# sun 2am and the previous sunday was the switch from CET to CEST (i.e.,

	# the switch to daylight saving time), the resulting datetime is invalid.

	# This is a fatal error. We avoid this edge case by performing date math

	# on the epoch timestamp, which does not know or care about time zones and

	# daylight saving time.

	my $one_day   = 24 * 60 * 60;

	my $one_week  = 7 * $one_day;

	my $one_month = 30 * $one_day;

	my @out;

	push(

	push(

		@out,

		query_to_influx(

			'checkins_24h_count',

			$db->query( $checkin_window_query, $now->epoch - $one_day )

			  ->hash->{count}

		)

	);

	push(

		@out,

		query_to_influx(

			'checkins_7d_count',

			$db->query( $checkin_window_query, $now->epoch - $one_week )

			  ->hash->{count}

		)

	);

	push(

		@out,

		query_to_influx(

			'checkins_30d_count',

			$db->query( $checkin_window_query, $now->epoch - $one_month )

			  ->hash->{count}

			'checkin_count',

			$db->select( 'journeys', 'count(*) as count' )->hash->{count}

		)

	);

	push(