Include every request field that can alter Kling video, image, avatar, or lip-sync media in the public idempotency contract. Add a shared regression matrix that detects future cache-key collisions while excluding transport-only controls.
Isolate Kling contract tests from the singleton registry so discovery state cannot leak into later selector tests. Align lip-sync face, audio, and timing payloads with the current official API and extend the live smoke coverage.
