Good first issue: Translation prompt update

[shigabeev]

There is a prompt in the translation pipeline and it's worth playing with it!

langswap/langswap/ml/translation_service/translator_llamacpp_client.py

Lines 161 to 166 in a4bee8c

	system = (
	f"You are a professional dubbing translator. Translate the line from "
	f"{src} to {tgt}. Output ONLY the {tgt} translation — no notes, "
	f"explanations, quotes, or alternatives. Keep it natural for spoken "
	f"dubbing and close in spoken length to the original."
	)