perf: tune selfbot runtime defaults

Apply low-memory client options and point the workspace vendor package at the optimized selfbot internals for more stable long-running moderation capture.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

tests/vendor/selfbotClientOptions.test.ts

@@ -0,0 +1,22 @@
+import { describe, expect, it } from "vitest";
+import { createDiscordClientOptions } from "../../src/discordClientOptions";
+
+describe("createDiscordClientOptions", () => {
+  it("uses low-memory message cache and active sweepers", () => {
+    const options = createDiscordClientOptions();
+
+    expect(options.restRequestTimeout).toBe(15_000);
+    expect(options.retryLimit).toBe(2);
+    expect(options.restGlobalRateLimit).toBe(45);
+    expect(options.sweepers).toEqual({
+      messages: { interval: 300, lifetime: 600 },
+      threads: { interval: 3600, lifetime: 14400 },
+    });
+    expect(options.partials).toEqual([
+      "USER",
+      "CHANNEL",
+      "GUILD_MEMBER",
+      "MESSAGE",
+    ]);
+  });
+});