v1.0.5

Changed

• Final output is now a verbatim byte copy. The last merged chunk is
  already in the exact output format ([int64 count][item]...), so Sort()
  copies its bytes straight to the output stream instead of deserializing and
  re-serializing every record. This removes a whole pass of per-record
  (string) allocation from the hot path.
  • Measured on the 50K end-to-end benchmark (Ryzen 9800X3D): allocation
    ~23.75 MB → ~21.8 MB (~8% less), and ~9–14% faster end-to-end
    (e.g. P=8 15.41 ms → 13.30 ms). Output is byte-identical
    (Read ∘ Write round-trips the format exactly).