Function run 

pub fn run(cli: &PublishArgs, args_tail: Option<&[String]>) -> i32

Run fdl publish. args_tail is everything after a standalone --: the training binary’s own arguments, which belong to the RUN and therefore to the manifest rather than to any worker’s config.

A top-level publish: block in fdl.yml (or the active env overlay) supplies standing answers so re-publishing a run is one bare command; flags win field by field, and a -- tail replaces the block’s args: outright.