fix(traffic): загружать данные потоков последовательно

app/(main)/traffic/page.tsx

@@ -924,18 +924,21 @@ export default function TrafficPage() {
       })
       return () => { cancelled = true }
     }
-    void Promise.all([
-      getTrafficFlows(backendUrl, range),
-      getFlowExporters(backendUrl, range),
-      getFlowClients(backendUrl, range),
-    ]).then(([stats, exporters, clients]) => {
+    const loadFlowCards = async () => {
+      // These reads share the collector's constrained admission budget.
+      const stats = await getTrafficFlows(backendUrl, range)
+      if (cancelled) return
+      const exporters = await getFlowExporters(backendUrl, range)
+      if (cancelled) return
+      const clients = await getFlowClients(backendUrl, range)
       if (cancelled) return
       setFlowResult({ key: flowKey, receivedAt: Date.now(), stats, exporters: exporters.exporters, clients: clients.clients })
       setSelectedId(prev => {
         const list = flowScope === "users" ? clients.clients : exporters.exporters
         return list.some(x => x.id === prev) ? prev : (list[0]?.id ?? "")
       })
-    }).catch(e => {
+    }
+    void loadFlowCards().catch(e => {
       if (!cancelled) setFlowResult({ key: flowKey, error: e instanceof Error ? e.message : "Не удалось загрузить потоки" })
     })
     return () => { cancelled = true }