Fix verse remotes and push phases to skip failed clones
The verse remotes phase and remote push phase were using the full
`repos` list instead of `successfully_fetched_repos`, causing crashes
when trying to access checkout directories that don't exist due to
failed clones.
Now both phases only operate on repos that were successfully cloned
or fetched, preventing "No such file or directory" errors.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>