fix(certificates): продлевать по подтверждённому сроку и проверить реальный импорт

docs/ux-ui/acceptance/acme256-tls-after.json

@@ -0,0 +1,10 @@
+{
+  "sampledAt": "2026-10-14T16:59:24.292Z",
+  "fqdn": "mmt253-8e62a941.pngs.top",
+  "remoteAddress": "104.165.244.7",
+  "authorized": true,
+  "fingerprint256": "70:B7:B9:F1:1A:77:E5:E1:D2:1B:43:07:4F:D8:4F:A3:34:A0:4B:B7:E8:71:31:5E:DA:17:39:63:8E:81:64:BE",
+  "validFrom": "Oct 14 15:58:34 2026 GMT",
+  "validUntil": "Jan 12 15:58:33 2027 GMT",
+  "changedFromBefore": true
+}