Ordered straight off a *_embeddings table, the planner walks the HNSW index,
takes ~ef_search (40) nearest chunks across every owner and project, and only
then applies the scope: an in-scope record behind 40 nearer ones the caller
cannot see was silently dropped. #4958 fixed the rule search alone; the note,
milestone and system searches kept the fault.
_scoped_chunks builds the in-scope chunks with their distance; _rank_scoped
materializes them as a CTE and ranks exactly. All four searches go through it,
and the row shape is unchanged, so callers and mocks are untouched.
Tests: a structural guard that every semantic_search_* ranks through
_rank_scoped and orders nothing itself (with a replay of the old shape), a
compiled-SQL check of the MATERIALIZED CTE, and integration crowd tests - 80
nearer out-of-scope records - for notes (another user; the reader own other
project), milestones and systems.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
