The optional native graph-acceleration provider exposes `isInitialized`,
which is false during its cold-start / rebuild window (engine + cursor not
yet loaded). The accessor cached the resolved provider INSTANCE but never
re-checked readiness, so `brain.graph.*` could dispatch to a not-ready
provider and throw instead of answering.
Resolve and cache the instance once, but check `isInitialized` LIVE on every
call: route to the pure-TS analytics path while the provider is not ready,
and re-engage the native path automatically the moment it flips true. This
gates every native route at once — subgraph, export, rank, communities,
path, and the query→expand fusion. Adds a test asserting the provider is
never called (and the TS fallback returns real answers) while not ready.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
David Snelling
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