Move to qbit-assistant-provider-api 0.1.0-RC.12, whose types now live in
com.kingsrook.qbits.assistant.spi (ModelPricing included), and to
qbit-build-parent 2.1.2, which allows that package by default. Drop the
per-repository guardrail allow-lists. qbit-assistant-provider-openai is
only used by tests, so it becomes test scope; hosts that register it add
it themselves.
Fix the stale README status (RCs are on Central; hosted in Voyage#113).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>