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circleci

fix(embedding): tier subject-match results above body-match (#209)

Return subject and body cosines separately from Store.Search so the
caller can surface subject-matches first. Previous weighted blend
(0.7*subject + 0.3*body) lost the distinction users expect: a literal
"table" in the subject should rank above one that only mentions "table"
in the body.

VectorSearch now splits hits into subject tier (subjectCos >= 0.65)
and body tier (only bodyCos >= 0.65), orders within each by cosine
plus keyword boost, and concatenates subject-first.

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

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