carapace-core's version, recorded for run provenance.
Model dimension: 2 (NDM=2/NDF=3) or 3 (NDM=3/NDF=6).
[decode] rejects any other value.
OptionalrecordRecord one sample of every supported recorder at the start of each Static/Transient
stage, before its first step (the stage's initial conditions, at load factor/time 0).
Off by default: every stage's samples are then only the ones its steps produce.
The wire format's own version, independent of engine_version.
Small structured-clone header fields — everything else in
CarapaceInputV1is a bulk table.