fix(api): сохранить последние снимки сертификатов

lib/certificate-snapshots.ts

@@ -0,0 +1,10 @@
+import type {CertificatesState,CertificateServerState} from "@mmapp/contracts/certificates"
+export type CertificateSnapshot = { latest: CertificateServerState; confirmed: CertificateServerState | null }
+export type CertificateSnapshots = Record<string, CertificateSnapshot>
+/** Replace the enabled-device inventory; retain each failed device's last confirmed snapshot. */
+export function mergeCertificateSnapshots(previous:CertificateSnapshots,result:CertificatesState):CertificateSnapshots {
+ return Object.fromEntries(result.servers.map(node=>[node.serverId,{
+  latest:node,
+  confirmed:node.error===null?node:previous[node.serverId]?.confirmed??null,
+ }]))
+}