chore(rest): подтвердить устойчивость повторных параллельных чтений

docs/ux-ui/acceptance/rest262-summary.json

@@ -0,0 +1,25 @@
+{
+  "date": "2026-10-15",
+  "block": "12.5.262",
+  "durationMs": 600916,
+  "waves": 21,
+  "requests": 252,
+  "deviceObservations": 504,
+  "errors": 0,
+  "allResponses200": true,
+  "receiptsAdvancedBetweenWaves": true,
+  "timingMs": {
+    "p50": 821,
+    "p95": 1687,
+    "max": 1933
+  },
+  "backend": "ux-certificates258",
+  "endpoint": "/api/certificates/state",
+  "configurationWrites": 0,
+  "tokenPersisted": false,
+  "bounds": [
+    "One backend, two CHR over HTTP REST; not a global cap for external clients or multiple backend instances",
+    "Concurrent normal collectors and UI acceptance may run; not maximum throughput",
+    "A finite successful window does not prove all historical 401/500 causes or indefinite stability"
+  ]
+}