Synthesize text to voice

Queues a TTS task. Validates model and speaker existence against the local cache. Returns request_id.

JSON Document Schema:

{
  "Path": "/ai/text-to-voice/lite",
  "Method": "post",
  "Tag": "AI: TEXT-TO-VOICE-LITE",
  "Summary": "Synthesize text to voice",
  "Description": "Queues a TTS task. Validates model and speaker existence against the local cache. Returns request_id.",
  "Parameters": [
    {
      "name": "text",
      "in": "formData",
      "description": "Text to synthesize",
      "required": true,
      "type": "string",
      "default": null
    },
    {
      "name": "model_id",
      "in": "formData",
      "description": "Model ID (e.g., ru_RU-denis-medium)",
      "required": true,
      "type": "string",
      "default": null
    },
    {
      "name": "speaker_id",
      "in": "formData",
      "description": "Speaker ID (if model supports multiple speakers)",
      "required": false,
      "type": "string",
      "default": null
    }
  ]
}