Function what_service_report_all 

pub fn what_service_report_all(
    corpus_name: String,
    service_name: String,
    severity: String,
    category: String,
    what: String,
    params: Option<ReportParams>,
    session: Option<AdminSession>,
    pool: &State<DbPool>,
) -> Result<Template, Status>

what-level report with paging/all-messages query params.