add more efficient aggregations for log service

...ponents/logs-dashboard/logs-home/logs-home.component.html

...logs-dashboard/logs-sessions/logs-sessions.component.html

...s/logs-dashboard/logs-sessions/logs-sessions.component.ts

...nents/logs-dashboard/logs-slugs/logs-slugs.component.html

...ponents/logs-dashboard/logs-slugs/logs-slugs.component.ts

...ard/report/logs-pre-report/logs-pre-report.component.html

...board/report/logs-pre-report/logs-pre-report.component.ts

src/app/services/data-logs.service.ts