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KaifAhmad1 88d73189dd fix(context): gate CJK bigram similarity fallback, persist recorded_at
_calculate_decision_content_similarity's character-bigram fallback was
unconditional, so ordinary multi-word English queries could pick up
incidental bigram overlap with unrelated decisions via max(word_sim,
bigram_sim). Gate it to only activate for CJK-like scripts or queries
with at most one whitespace token, matching its documented purpose.

Separately, _add_decision_to_graph never persisted recorded_at as a
node property, so _rebuild_decision_indexes/_sync_decision_from_node
(which already read it back) always recovered "" after any reload.
2026-08-26 16:38:39 +05:30
..