feat: establish NekoNest Cloud control and relay

db/service-status.ts

@@ -0,0 +1,26 @@
+export type IncidentSeverity = "maintenance" | "degraded" | "outage";
+
+export type ServiceStatusLevel =
+  | "operational"
+  | "maintenance"
+  | "degraded"
+  | "outage";
+
+const severityRank: Record<IncidentSeverity, number> = {
+  maintenance: 1,
+  degraded: 2,
+  outage: 3,
+};
+
+export function deriveServiceStatus(
+  incidents: ReadonlyArray<{ severity: IncidentSeverity; status: string }>,
+): ServiceStatusLevel {
+  let selected: IncidentSeverity | null = null;
+  for (const incident of incidents) {
+    if (incident.status !== "active") continue;
+    if (!selected || severityRank[incident.severity] > severityRank[selected]) {
+      selected = incident.severity;
+    }
+  }
+  return selected ?? "operational";
+}