v3.19.5

Fixed

• An empty model response no longer breaks the session. A turn with no content and no tool calls was stored as a content-less assistant message, which OpenAI-compatible APIs reject (Invalid assistant message: content or tool_calls must be set) — so every later turn 400'd mid-conversation. Kodiqa no longer stores such a turn, and the message builder drops any already in history so a stuck session recovers on the next message.