Optimize proxy scheduler throughput and fairness

src/renderer/App.tsx

@@ -953,7 +953,7 @@ const emptySnapshot = (): UiSnapshot => ({
     removeSamplesAfterExtract: false, enableIntegrityCheck: true, autoResumeOnStart: true,
     autoReconnect: false, reconnectWaitSeconds: 45, completedCleanupPolicy: "never",
     maxParallel: 4, maxParallelExtract: 2, extractCpuPriority: "high", retryLimit: 0, speedLimitEnabled: false, speedLimitKbps: 0, speedLimitMode: "global",
-    proxyDownloadEnabled: false, proxyListPath: "", proxyApiProxyIndex: 1, proxyConnectionsPerDownload: 16,
+    proxyDownloadEnabled: false, proxyListPath: "", proxyApiProxyIndex: 1, proxyConnectionsPerDownload: 20,
     updateRepo: "", autoUpdateCheck: true, clipboardWatch: false, minimizeToTray: false,
     theme: "dark", themePreference: "dark", logStorageLocation: "appdata", collapseNewPackages: true, animatePackageDisclosure: true, historyRetentionMode: "permanent", historyMaxEntries: 500, historyMaxAgeDays: 0, autoSortPackagesByProgress: false, autoSkipExtracted: false, hideExtractedItems: true, confirmDeleteSelection: true, backupIncludeDownloads: false, backupIncludeRemoteDiagnostics: false,
     notifyMention: "", notifyOnPackageCompleted: false, notifyOnPackageFailed: false, notifyOnRunFinished: false,
@@ -6067,7 +6067,7 @@ export function App(): ReactElement {
         maxParallelExtract: [1, 8, 2],
         reconnectWaitSeconds: [10, 600, 45],
         proxyApiProxyIndex: [1, 100000, 1],
-        proxyConnectionsPerDownload: [2, 32, 16]
+        proxyConnectionsPerDownload: [2, 32, 20]
       };
       const bounds = numericLimits[fieldId as keyof RendererSettingsDraft];
       if (bounds) {