fix(synth-audio): include the Polly VoiceId in the aws say: url

synthPolly received voice but never emitted it into the say:{...} url
(unlike synthMicrosoft, which includes voice=). Polly's SynthesizeSpeech
requires a VoiceId, so the media-server-native (say:-url) Polly path had no
way to pick a voice. Add voice= to the params.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

lib/synth-audio.js

@@ -316,6 +316,7 @@ const synthPolly = async(createHash, retrieveHash, logger,
     params += `,playback_id=${key}`;
     params += `,write_cache_file=${disableTtsCache ? 0 : 1}`;
     params += ',vendor=aws';
+    params += `,voice=${voice}`;
     if (accessKeyId && secretAccessKey) {
       if (accessKeyId) params += `,accessKeyId=${accessKeyId}`;
       if (secretAccessKey) params += `,secretAccessKey=${secretAccessKey}`;

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@jambonz/speech-utils",
-  "version": "1.0.4",
+  "version": "1.0.5",
   "description": "TTS-related speech utilities for jambonz",
   "main": "index.js",
   "author": "Dave Horton",