feat: add TikTok follower integration and reduce cache revalidation interval to one hour

lib/followers/index.ts

@@ -1,6 +1,7 @@
 import { getYoutubeSubscriberCount } from "./youtube";
 import { getRobloxFollowerCount } from "./roblox";
 import { getDiscordMemberCount } from "./discord";
+import { getTiktokFollowerCount } from "./tiktok";
 
 export interface FollowerCounts {
   youtube: number | null;
@@ -15,15 +16,13 @@ export interface FollowerInfo {
 }
 
 export async function getFollowerCounts(): Promise<FollowerCounts> {
-  const [youtube, roblox, discord] = await Promise.all([
+  const [youtube, roblox, discord, tiktok] = await Promise.all([
     getYoutubeSubscriberCount(),
     getRobloxFollowerCount(),
     getDiscordMemberCount(),
+    getTiktokFollowerCount(),
   ]);
 
-  const tiktokEnv = process.env.TIKTOK_FOLLOWERS;
-  const tiktok = tiktokEnv ? Number(tiktokEnv) : null;
-
   return { youtube, roblox, discord, tiktok };
 }