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[MDA2AV]

1. Takes a server string input (e.g. NginxServer)
2. Validates the server directory exists, failing early with a list of available servers if not
3. Builds the probe CLI and the server's Docker image
4. Starts the container, waits for it, then runs the probe with --verbose
5. Cleans up the container in an always() step

No artifacts or PR comments — just full verbose output in the job log for debugging.