~anthropic/claude-sonnet-latest → A (6:4)

Side A performs a real type-safety refactor (introducing Deref for newtypes, threading CanonicalItemUrl through resolve_item, validation, rank computation, and pair selection), removing ad-hoc string/CanonicalItemUrl conversions and reducing risk of key-mismatch bugs across the ranking pipeline. Side B is a legitimate but narrower fix consolidating hostname/base-URL logic into a single util function and adjusting CI deploy branch, which is useful but smaller in scope and lasting architectural impact compared to A's cross-cutting type unification.