Append overlapping observations to node buckets instead of recopying groups, and share one node index across semantic seed admission and traversal. Preserve merged provenance and absent-seed behavior.
Intern shared provenance in a graph-scoped context registry while retaining exact locations on every fact. Semantic traces carry their referenced context subset, and portable graph validation rejects stale or dangling commitments.
BREAKING CHANGE: Semantic graph facts now store evidence context IDs and locations. Graph and semantic trace results require an inline evidence_contexts table.
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