Replace ContainerInspect with ContainerList and name filters for exact and prefix matching. This improves efficiency and correctness by leveraging Docker's filtering capabilities, matching the old shell script's grep behavior more accurately. Add regexp import to properly escape container names in filters.
Implement FindContainerName method on DockerAPI that attempts exact match
first, then falls back to prefix-based matching (e.g., extracting prefix
before dash like "service-" in "service-abc") to replicate the old shell
script's `grep $D"-"` behavior. Update firewall orchestrator to use this
resolution before connecting containers to networks, improving robustness
when container names vary from configured selectors.
