An owner-qualified version-less dependency was skipped by both the
arduino backend (owner set) and the reconciliation (provides() knew the
short name), so nothing logged the drop; provides() now only satisfies
owner-less names, mirroring the walk's backend-provided guard. A dict
dependency entry with no name at all now warns in the normalizer like
any other malformed entry.
Bundled dependency additions are deferred until conversion finishes and
skipped when a converted library's manifest already provides the name,
so a name that is both bundled and registry-resolved cannot build twice.
External short names come from the request spec (custom Name=url form
included) instead of the URL tail. The empty-bundled-library probe now
walks the whole library tree against a shared header-suffix constant,
and the dead versioned-dependency branch is folded into the surviving
check.