A test that slept a fixed time and then asserted what a goroutine, process or
watcher did failed under the checker's load. Each now waits for its positive
evidence (a started baseline, a call counted, a state reached) within 30 s, and
the concurrency-limit tests meet at a barrier instead of overlapping by sleep.
Claude-Session: https://claude.ai/code/session_01NcbgfJ9Gum47zkFKWRaovL
Compose and nothing else, for the two workstations, where it is already
installed by hand; the runtime, buildx and the group stay the docker
module's. Nine Go tools: projects (with their directories from the
containers' labels), ps, logs, a rendered config with secret-looking values
redacted, and up, down, restart and pull by directory or name. Acts run as
jobs inside the bundle, waited on for 18 s and followed with
docker_compose_job, because an up that pulls outlasts a call. down never
removes volumes.