ai-service/ wraps generate_draft/escalation_filter/retrieve_style
behind a single POST /draft endpoint that the Go core will call
internally. poc/tone-corpus/ stays untouched for corpus experiments
and blind-eval; this is the promoted copy meant for the real service.
Verified with TestClient: style_examples path, history/retrieval
path (confirms the earlier scoring fix still ranks the on-topic
exemplar first), escalation short-circuit, and 422 validation when
zero or both of style_examples/history are given.
Still missing: the Go core's actual HTTP client calling this service.
Claude