Count all verifications in total to stats

[tuommaki]

Instead of counting verified Run transactions, count all verifications in total that exist in DB.

[github-actions]

LOCATION	FUNCTION	COVERAGE
api/api.go:39:	New	90.0%
api/api.go:63:	ServeHTTP	100.0%
api/api.go:67:	index	22.2%
api/api.go:82:	stats	57.1%
api/api.go:96:	table	26.7%
api/api.go:123:	stream	65.4%
api/api.go:162:	SearchFilter	0.0%
api/api.go:171:	NoFilter	100.0%
api/broadcaster.go:36:	NewBroadcaster	100.0%
api/broadcaster.go:45:	Subscribe	100.0%
api/broadcaster.go:73:	Run	71.4%
api/broadcaster.go:88:	broadcast	90.9%
api/broadcaster.go:126:	Stop	100.0%
api/broadcaster.go:131:	writeEvent	80.0%
api/server.go:16:	NewServer	75.0%
api/server.go:30:	Run	80.0%
api/server.go:39:	Stop	100.0%
api/templates/index_templ.go:23:	Index	75.7%
api/templates/index_templ.go:75:	Stats	74.2%
api/templates/index_templ.go:159:	Table	71.4%
api/templates/index_templ.go:209:	Row	59.3%
api/templates/index_templ.go:325:	head	68.8%
api/templates/index_templ.go:349:	header	68.8%
api/templates/index_templ.go:373:	footer	69.2%
api/templates/index_templ.go:412:	format	100.0%
app/app.go:23:	Run	80.0%
app/app.go:65:	ParseConfig	75.0%
app/runner.go:21:	NewRunner	100.0%
app/runner.go:32:	Run	100.0%
app/runner.go:48:	Stop	0.0%
cmd/devnet-explorer/main.go:15:	init	100.0%
cmd/devnet-explorer/main.go:19:	main	42.9%
signalhandler/signal_handler.go:14:	New	100.0%
signalhandler/signal_handler.go:21:	Run	83.3%
signalhandler/signal_handler.go:32:	Stop	100.0%
store/mock/store.go:24:	New	0.0%
store/mock/store.go:32:	Stats	0.0%
store/mock/store.go:40:	Run	0.0%
store/mock/store.go:56:	Events	0.0%
store/mock/store.go:60:	Search	0.0%
store/mock/store.go:76:	Stop	0.0%
store/mock/store.go:81:	randomEvent	0.0%
store/pg/store.go:27:	New	80.0%
store/pg/store.go:42:	Run	77.3%
store/pg/store.go:83:	Stats	80.0%
store/pg/store.go:99:	Search	0.0%
store/pg/store.go:157:	Events	100.0%
store/pg/store.go:161:	Stop	100.0%
total:	(statements)	66.5%