honors Context Filter
Whether this backend confines entity-axis graph queries to a supplied context on its own.
Left false by default. While it is false the portable facade keeps context scoping on its own proposition-edge path for any context-bound query, so a scoped query still returns correct, context-confined results even on a backend that ignores the context. Flip it to true only once the context-aware overloads below genuinely honour their contextId argument — that is the signal that lets the facade route scoped queries down here instead of falling back.