fix(deploy): co-locate agent-challenge api+worker so they share /data… #631

Job	Run time
format	12s
production-policy	15s
postgres-orm	35s
ruff	13s
mypy	31s
coverage	27s
docker-build (base, docker/Dockerfile.validator)	31s
docker-build (base-master, docker/Dockerfile.master)	28s
docker-publish (base-master, docker/Dockerfile.master)	58s
docker-publish (base, docker/Dockerfile.validator)	48s
github-release	-1s
	4m 57s

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