Adds the AI executor that powers the Futura campaign responder pilot.
- Produces strict
ResponderOutputV1output using the Vercel AI SDK with Zod schema validation. - Short-circuits the model call when the deterministic classifier already resolved opt-out with confidence 1.0.
- Falls back to
human_reviewif model output is unparseable — never throws. - Italian-language system and user prompts with GB Viaggi/Futura tone guidance.
- No DB writes, no auto-send, no MCP tool exposure.