Same class of bug as required-stack.bats: hardcoded required_containers
included mempool/mempool-api unconditionally, so a node without the
mempool stack (e.g. .5) hard-fails restarting a container that was never
installed, and waits out full 180-240s timeouts probing endpoints that
will never come up. Likely explains .5's abnormally long (2216s) iteration
1 runtime during the current multinode-pass run. Same skip-if-absent fix
as the prior commit.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>