curl --request GET \
  --url https://api.superwhisper.com/api/v1/stats \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "time_bucket": "<string>",
      "recording_count": 123,
      "total_words": 123,
      "total_duration": 123,
      "avg_llm_processing_time": 123,
      "avg_voice_processing_time": 123,
      "avg_wpm": 123
    }
  ],
  "pagination": {
    "page": 123,
    "page_size": 123,
    "total_rows": 123,
    "total_pages": 123,
    "count": 123
  },
  "meta": {
    "start_date": "<string>",
    "end_date": "<string>",
    "granularity": "<string>",
    "group_by": "<string>"
  }
}