Add overloaded convert signatures to SpeechToText wrapper

Narrow the return type of speechToText.convert() based on request
parameters so users can access .text, .transcripts, or webhook fields
without manual type narrowing.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Thomas Baker

src/wrapper/speechToText.ts

@@ -1,4 +1,7 @@
 import { SpeechToTextClient as GeneratedSpeechToText } from "../api/resources/speechToText/client/Client";
+import type { SpeechToTextClient } from "../api/resources/speechToText/client/Client";
+import type * as ElevenLabs from "../api";
+import type * as core from "../core";
 import { ScribeRealtime } from "./realtime";
 
 export class SpeechToText extends GeneratedSpeechToText {
@@ -10,5 +13,26 @@ export class SpeechToText extends GeneratedSpeechToText {
         }
         return this._realtime;
     }
-}
 
+    public convert(
+        request: ElevenLabs.BodySpeechToTextV1SpeechToTextPost & { webhook: true },
+        requestOptions?: SpeechToTextClient.RequestOptions,
+    ): core.HttpResponsePromise<ElevenLabs.SpeechToTextWebhookResponseModel>;
+
+    public convert(
+        request: ElevenLabs.BodySpeechToTextV1SpeechToTextPost & { useMultiChannel: true },
+        requestOptions?: SpeechToTextClient.RequestOptions,
+    ): core.HttpResponsePromise<ElevenLabs.MultichannelSpeechToTextResponseModel>;
+
+    public convert(
+        request: ElevenLabs.BodySpeechToTextV1SpeechToTextPost,
+        requestOptions?: SpeechToTextClient.RequestOptions,
+    ): core.HttpResponsePromise<ElevenLabs.SpeechToTextChunkResponseModel>;
+
+    public convert(
+        request: ElevenLabs.BodySpeechToTextV1SpeechToTextPost,
+        requestOptions?: SpeechToTextClient.RequestOptions,
+    ): core.HttpResponsePromise<ElevenLabs.SpeechToTextConvertResponse> {
+        return super.convert(request, requestOptions);
+    }
+}