strop v0.32.4

Captures of terminal sessions cost a third of 0.32.3's bytes.

Improved

• Repeating rows travel once per frame: rows that recur anywhere in a
  terminal frame serialize into a first-appearance dictionary and are
  referenced by index runs; unique rows stay inline, so varied content
  pays nothing. A flooded frame collapses to its few distinct rows and
  repeated positions decode back to one shared row — the same session
  that recorded ~2.4 MB now records ~0.7 MB, complete and replayable,
  and slow-runner drains halve. Traces from every earlier version still
  decode.