Package computespark is a togo compute backend that submits jobs to Apache
Spark via spark-submit. Registers into the compute plugin's `compute` slot.
Select with `togo provider:use compute spark`.
Config (dynamic — CLI/.env/settings):
SPARK_SUBMIT_BIN spark-submit binary (default "spark-submit")
SPARK_MASTER --master value (e.g. yarn, k8s://…, local[*])
SPARK_OPTS extra spark-submit opts (space-separated)