fix(api): сохранять каталог пинг-проб атомарно

lib/dashboard-probes.ts

@@ -21,3 +21,5 @@ export function parseDashboardProbes(raw:unknown):{probes:DashboardProbe[];sampl
  const active=probes.filter(p=>p.enabled),times=active.map(p=>p.sampledAt).filter((v):v is string=>!!v)
  return {probes,sampledAt:active.length&&times.length===active.length?new Date(times.reduce((oldest,v)=>Math.min(oldest,Date.parse(v)),Infinity)).toISOString():null}
 }
+
+export { overview as dashboardProbeOverviewSchema }