fix(telegram): guard voice note sends

src/telegram/voice.ts

@@ -0,0 +1,15 @@
+import path from "node:path";
+
+export function isTelegramVoiceCompatible(opts: {
+  contentType?: string | null;
+  fileName?: string | null;
+}): boolean {
+  const mime = opts.contentType?.toLowerCase();
+  if (mime && (mime.includes("ogg") || mime.includes("opus"))) {
+    return true;
+  }
+  const fileName = opts.fileName?.trim();
+  if (!fileName) return false;
+  const ext = path.extname(fileName).toLowerCase();
+  return ext === ".ogg" || ext === ".opus" || ext === ".oga";
+}