Traefik Mesh controller ↔ Traefik Proxy: config parse safety after controller downgrade
When a Traefik Mesh controller is upgraded to a version that introduces a new CRD schema (for example, a revised TrafficSplit definition), the controller continues to serve both the old and new versions while the Traefik Proxy only understands the schema version it was compiled against. If the controller is later rolled back to the pre‑upgrade version, any C