fix(telegram): keep webhook monitor alive until abort

Co-authored-by: Evgeny Zislis <7056+kesor@users.noreply.github.com>

src/telegram/monitor.ts

@@ -178,6 +178,15 @@ export async function monitorTelegramProvider(opts: MonitorTelegramOpts = {}) {
         abortSignal: opts.abortSignal,
         publicUrl: opts.webhookUrl,
       });
+      if (opts.abortSignal && !opts.abortSignal.aborted) {
+        await new Promise<void>((resolve) => {
+          const onAbort = () => {
+            opts.abortSignal?.removeEventListener("abort", onAbort);
+            resolve();
+          };
+          opts.abortSignal.addEventListener("abort", onAbort, { once: true });
+        });
+      }
       return;
     }