Optimize proxy scheduler throughput and fairness

tests/storage.test.ts

@@ -568,7 +568,7 @@ describe("settings storage", () => {
     expect(backup).not.toContain(value);
   });
 
-  it("normalizes invalid enum and numeric values", () => {
+  it("normalizes invalid enum and numeric values", () => {
     const normalized = normalizeSettings({
       ...defaultSettings(),
       providerPrimary: "invalid-provider" as unknown as AppSettings["providerPrimary"],
@@ -610,10 +610,14 @@ describe("settings storage", () => {
     expect(normalized.outputDir).toBe(defaultSettings().outputDir);
     expect(normalized.extractDir).toBe(defaultSettings().extractDir);
     expect(normalized.mkvLibraryDir).toBe(defaultSettings().mkvLibraryDir);
-    expect(normalized.updateRepo).toBe(defaultSettings().updateRepo);
-  });
-
-  it("migrates the previous private update repository to the public release repository", () => {
+    expect(normalized.updateRepo).toBe(defaultSettings().updateRepo);
+  });
+
+  it("uses 20 total proxy connections as the default for new settings", () => {
+    expect(defaultSettings().proxyConnectionsPerDownload).toBe(20);
+  });
+
+  it("migrates the previous private update repository to the public release repository", () => {
     for (const updateRepo of [
       "legacy-owner/real-debrid-downloader",
       "legacy-owner/multi-debrid-downloader",