v0.115.7

Added

• put transcription on one contract and route every Whisper call through it (#357)
• put text-to-speech providers on one contract and open narration to all of them (#356)
• put image providers on one contract and drop CLI provider branches (#355)

Changed

• run audio commands on their executors and the shared HTTP layer (#358)

Fixed

• dub with a real translation, any TTS provider, and lines placed on time (#359)