fix(traffic): объединять чтения истории общего сервера

docs/ux-ui/acceptance/traffic-users193-sql193-result.json

@@ -0,0 +1,31 @@
+{
+  "date": "2026-10-13",
+  "block": "12.5.193",
+  "passed": true,
+  "profiles": [
+    {
+      "date": "2026-10-13",
+      "block": "12.5.193",
+      "database": "mm_accept_166_1791875479842",
+      "scope": "ephemeral role and precreated owned database; no copied production credentials",
+      "tests": [
+        {
+          "command": "npm --prefix backend run test:traffic-rate",
+          "passed": true,
+          "durationMs": 41959,
+          "ownedTrafficSqlCases": 9,
+          "ownedHistorySqlCases": 14,
+          "ownedLiveSqlCases": 10,
+          "ownedVolumeSqlCases": 17,
+          "ownedStatusSqlCases": 21,
+          "postgresUnavailableSkip": false
+        }
+      ],
+      "scopedRoleVerified": true,
+      "passed": true,
+      "databaseRemoved": true,
+      "roleRemoved": true,
+      "testContainerRemoved": true
+    }
+  ]
+}