Apply a set of Rosetta Stone attribute mappings to a Narrative
dataset by wrapping them in a one-shot workflow that calls the
`CreateRosettaStoneMappingsIfNotExist` task. Consumes the structured
output of `/generate-rosetta-stone-mappings`, normalizes the
generator's snake_case to the workflow task's camelCase, re-validates
every expression against the dataset's current schema, gates on
user approval, submits via `narrative_workflows_create`, polls the
triggered run, and reports per-mapping created / conflict / failed.
Use when: "apply these mappings to dataset N", "create the
Rosetta Stone mappings I just generated", "push the mappings I
saved earlier to <dataset>", "pro…
