chore(tdlib): upgrade tdl 8.0.0 → 8.1.0 and prebuilt-tdlib 1.8.50 → 1.8.64

12 versions of TDLib bug fixes, performance improvements, and stricter
type definitions in @prebuilt-tdlib/types.

Two API breakages handled:

1. `getChatFolders` (plural) was removed — folder IDs now arrive via
   the `updateChatFolders` update event. Replaced the synchronous call
   with a 200ms event listener; if no folders arrive, we proceed with
   just main + archive lists. Chats inside folders are still reachable
   from chatListMain so this isn't a functional regression.

2. The new tdl `Client.invoke` signature requires a literal `_` field
   and rejects `Record<string, any>` shapes. Our `invokeWithTimeout`
   wrapper is intentionally generic — cast through `any` at the call
   site with a comment explaining why.

Both worker and bot type-check + build cleanly with the new versions.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

worker/src/tdlib/download.ts

@@ -115,7 +115,10 @@ export async function invokeWithTimeout<T>(
           }
         }, timeoutMs);
 
-        (client.invoke(request) as Promise<T>)
+        // The tdl 8.1+ types are very strict about the literal `_` field;
+        // our generic wrapper passes arbitrary requests, so cast through any.
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        (client.invoke(request as any) as Promise<T>)
           .then((result) => {
             if (!settled) {
               settled = true;