Generates Forth-style command scripts that build a multi-dimensional
model and exercise the grid aggregation hot path via repeated
export-csv calls. Used for profiling with samply.
Usage:
python3 bench/gen_workload.py --scale 5 > /tmp/workload.txt
cargo build --profile profiling
samply record ./target/profiling/improvise script /tmp/workload.txt
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
