v0.2.3 - 技能保真度：点明被编辑的 code 格会补上 outputs/execution_count

[0.2.3] - 2026-10-15

Fixed

• The skill's fidelity section claimed that nothing is ever invented, full stop.
  The cell you edit is the exception: editing a code cell writes outputs and
  execution_count — that is what "clear the outputs" means — so a cell that
  carried neither key gains both, appended at the end of its key order. Only
  untouched cells keep their exact shape. The wording now says so, bullet by
  bullet, instead of leaving the reader to discover it from a byte diff.
  Verified end to end against a hand-written nbformat 4.4 file (2-space indent,
  CRLF, no trailing newline, no cell ids): the untouched cells kept their array
  source and their outputs/execution_count and were not given an id; the
  file kept its indent, its CRLF and its missing trailing newline; the edited
  cell alone came back with the two keys appended.