score property
Score is the leg's NATIVE score, on that leg's own scale, reported for explanation and never used in ranking — the scales are incomparable (a cosine similarity against a term-match count), which is why fusion works on ranks. The vector leg reports Qdrant's cosine similarity; the lexical leg exposes no per-row score and reports 0, meaning "unscored", not "scored zero".
Please note: This property should have been non-nullable! Since the specification file does not include a default value (using the "default:" property), however, the generated source code must fall back to having a nullable type. Consider adding a "default:" property in the specification file to hide this note.
Implementation
num? score;