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* fix(stores): Actually check a vector is a unit vector/normalized Instead of just summing the components to see if they equal 1.0, take the actual magnitude/p-norm of the vector and check that is approximately 1.0. Note that this shouldn't change the order of results except in edge cases if I am too lax with the precision of the equality comparison. However it should improve performance for normalized vectors which were being misclassified. Signed-off-by: Richard Palethorpe <io@richiejp.com> * fix(stores): Add tests for known results and triangle inequality This adds some more tests to check the cosine similarity function has some expected mathematical properties. Signed-off-by: Richard Palethorpe <io@richiejp.com> --------- Signed-off-by: Richard Palethorpe <io@richiejp.com>