fix(uptime): проверить RTT через SQL и обновить тестовый стенд

docs/ux-ui/acceptance/ping-duration-sql-2026-10-12.json

@@ -0,0 +1,20 @@
+{
+  "date": "2026-10-12",
+  "block": "12.5.177",
+  "database": "mm_accept_166_1791803917983",
+  "scope": "ephemeral role and precreated owned database; no copied production credentials",
+  "tests": [
+    {
+      "command": "npm --prefix backend run test:probes",
+      "passed": true,
+      "durationMs": 24383,
+      "ownedPingSqlCases": 10,
+      "postgresUnavailableSkip": false
+    }
+  ],
+  "scopedRoleVerified": true,
+  "passed": true,
+  "databaseRemoved": true,
+  "roleRemoved": true,
+  "testContainerRemoved": true
+}