A human-friendly, actionable message for a adapter_module that failed to load, naming the Hex package to add when it's a known Selecto adapter.

Formats a SelectoMix.Connection / SelectoMix.Introspector adapter error tuple into a human-readable message, naming the Hex package to add when the adapter module itself is missing.

The Hex package name (e.g. "selecto_db_postgresql") that provides adapter_module, if known.

Known short adapter names accepted by the CLI.

Resolve a CLI adapter value to a module.