fix(metadata-protocol): the per-item publish and the draft discard that name no package act on the draft the draft save writes

WIP: the draft address helper, the publish and discard routing, the
orphan-draft adoption on promotion, the publish arm of the shared
ambiguity refusal, and the draft-save receipt naming the inherited
package. Tests and changeset follow.

Claude-Session: https://claude.ai/code/session_01GP3comALHRcRBixS2TEnLF
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude