[9.5] Backport bbq_flat yaml refresh fixes#154996
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Backports two test-only visibility fixes to 9.5: - elastic#154272 add index refresh to bbq yaml tests - elastic#154688 add index refresh after forced merge The 9.5 setup for search.vectors/42_knn_search_bbq_flat never refreshed after indexing/forcemerge, so the knn search could run against a pre-refresh view missing the last-indexed doc, intermittently returning 2 hits instead of 3. Also unmutes the corresponding test (elastic#154705).
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Backports two test-only visibility fixes to
9.5:Why
The
9.5setup forsearch.vectors/42_knn_search_bbq_flat("Test knn search") indexed three docs and force-merged but never refreshed before searching. This resulted in intermittently returning 2 hits instead of 3 and failing:Both refresh fixes already exist on
mainbut were never backported to9.5/9.4; this brings9.5in line withmain.Closes #154705