Upgrade Pack Generator

Generate upgrade-pack folders for dependency families in two stages:

1. Author or refine a reusable family override.
2. Instantiate a repo-specific pack from that family plus live repo context.

The generator is monorepo-aware. During enrichment it must lock an explicit owner surface for the family:

• repo root
• one owning workspace
• repo root plus related workspaces

The generated pack is docs/research only. Do not implement package changes while generating the pack.

Core Workflow