DataFusion-free vocabulary for the versioned Query protocol.
This crate contains only semantic requests and result frames.
The REQUEST grants no scope. It names no realm, namespace, partition, table, source, or object. The Query service derives every one of those facts from the credential it verifies at its own boundary.
The TERMINAL FRAME is the opposite by design. It carries State's complete
source evidence, so SourceSnapshot transitively reaches State's
manifest and object vocabulary: projection keys, source checkpoints, object
descriptors, and namespaces. That evidence flows from the server to the
caller and grants the caller nothing. Do not read the small re-export list
below as a small type graph.