Add stats delta query

[heppu]

No description provided.

[github-actions]

LOCATION	FUNCTION	COVERAGE
api/api.go:33:	New	90.9%
api/api.go:55:	ServeHTTP	100.0%
api/api.go:59:	index	42.9%
api/api.go:72:	txPage	0.0%
api/api.go:95:	stats	42.9%
api/api.go:108:	table	26.7%
api/api.go:135:	stream	65.4%
api/api.go:174:	SearchFilter	0.0%
api/api.go:183:	NoFilter	100.0%
api/api.go:187:	push	14.3%
api/broadcaster.go:40:	NewBroadcaster	100.0%
api/broadcaster.go:50:	Subscribe	100.0%
api/broadcaster.go:73:	Run	71.4%
api/broadcaster.go:88:	broadcast	90.5%
api/broadcaster.go:125:	Stop	100.0%
api/broadcaster.go:130:	writeEvent	87.5%
api/event_buffer.go:26:	newEventBuffer	100.0%
api/event_buffer.go:33:	add	91.7%
api/event_buffer.go:52:	writeAllToCh	100.0%
api/server.go:15:	NewServer	75.0%
api/server.go:29:	Run	80.0%
api/server.go:38:	Stop	100.0%
api/templates/index_templ.go:23:	Index	75.7%
api/templates/index_templ.go:75:	TxPage	0.0%
api/templates/index_templ.go:127:	Stats	72.9%
api/templates/index_templ.go:255:	Table	71.4%
api/templates/index_templ.go:305:	Row	61.2%
api/templates/index_templ.go:461:	Tx	0.0%
api/templates/index_templ.go:497:	TxInfo	0.0%
api/templates/index_templ.go:567:	TxIDBlock	0.0%
api/templates/index_templ.go:634:	TxLog	0.0%
api/templates/index_templ.go:668:	TxLogEvent	0.0%
api/templates/index_templ.go:774:	head	68.8%
api/templates/index_templ.go:798:	header	68.8%
api/templates/index_templ.go:822:	footer	69.2%
api/templates/index_templ.go:859:	copyToClipboard	0.0%
api/templates/index_templ.go:871:	format	100.0%
api/templates/index_templ.go:877:	formatPercentage	75.0%
api/templates/index_templ.go:885:	formatDuration	0.0%
api/templates/index_templ.go:892:	txLinkAttrs	100.0%
app/app.go:37:	Run	81.8%
app/app.go:84:	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%
model/model.go:66:	String	0.0%
model/model.go:81:	Since	83.3%
model/model.go:96:	sr	0.0%
model/model.go:105:	ParseStatsRange	33.3%
model/model.go:120:	SupportedStatsRanges	100.0%
model/model.go:134:	String	50.0%
model/model.go:149:	Scan	0.0%
model/model.go:162:	Value	0.0%
model/model.go:166:	MarshalJSON	0.0%
model/model.go:170:	UnmarshalJSON	75.0%
model/model.go:183:	ParseState	33.3%
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/cache/stats_cache.go:25:	NewStatsCache	100.0%
store/cache/stats_cache.go:33:	Run	62.5%
store/cache/stats_cache.go:51:	Stop	100.0%
store/cache/stats_cache.go:56:	refresh	88.9%
store/cache/stats_cache.go:71:	CachedStats	100.0%
store/mock/store.go:31:	New	0.0%
store/mock/store.go:39:	Stats	0.0%
store/mock/store.go:51:	Run	0.0%
store/mock/store.go:67:	Events	0.0%
store/mock/store.go:71:	Search	0.0%
store/mock/store.go:87:	TxInfo	0.0%
store/mock/store.go:95:	Stop	0.0%
store/mock/store.go:100:	nextEvent	0.0%
store/mock/store.go:176:	randomEvent	0.0%
store/pg/store.go:31:	Scan	0.0%
store/pg/store.go:51:	Value	0.0%
store/pg/store.go:82:	New	80.0%
store/pg/store.go:97:	Run	77.3%
store/pg/store.go:139:	Stats	52.9%
store/pg/store.go:182:	Search	0.0%
store/pg/store.go:240:	TxInfo	0.0%
store/pg/store.go:313:	LatestDailyStats	0.0%
store/pg/store.go:327:	AggregateStats	0.0%
store/pg/store.go:331:	Events	100.0%
store/pg/store.go:335:	Stop	100.0%
store/pg/store.go:341:	getJobDuration	0.0%
store/pg/store.go:358:	getState	0.0%
store/pg/store.go:382:	stateFromKind	0.0%
store/pg/store.go:395:	txLogEventsFromTxs	0.0%
total:	(statements)	41.5%