feat: add summary dashboard history charts

Sources/Model/API/Versions/APIv2_12.swift

@@ -168,6 +168,17 @@ class APIv2_12: BaseAPIClient, ServerAPIProtocol {
         return try await performRequest(request, responseType: UtilizationType.self)
     }
 
+    func fetchCPUUtilizationPercent(apiKey: String) async throws -> Double {
+        let url = Endpoint.utilization.url(baseURL: baseURL)
+        var request = URLRequest(url: url)
+        request.setValue("application/json", forHTTPHeaderField: "Accept")
+        request.setValue(apiKey, forHTTPHeaderField: "X-API-KEY")
+        request.timeoutInterval = 30
+
+        let utilization = try await performRequest(request, responseType: UtilizationType.self)
+        return utilization.cpu.overall
+    }
+
     func fetchServerSummary(apiKey: String) async throws -> ServerInfo {
         let summaryURL = baseURL.appendingPathComponent("api/v2/server")
         var request = URLRequest(url: summaryURL)
@@ -397,6 +408,7 @@ private extension APIv2_12 {
                     total: disk.total,
                     percent: disk.percent
                 ),
+                cpuUtilizationPercent: nil,
                 panelVersion: meta.panelVersion,
                 panelBuild: String(meta.panelBuild),
                 apiVersion: meta.apiVersion,