~anthropic/claude-sonnet-latest → B (80:20)

Side B is a genuine, coherent type-safety refactor that threads CanonicalItemUrl through resolve_item, rank change computation, pair selection, and validation, reducing string-based bugs and improving compile-time guarantees. Side A merely adds unintegrated scaffolding files (Dockerfile, fly.toml, event_log.rs, views.rs, deps.edn) that aren't wired into the codebase and appear to be dumped, disconnected infrastructure rather than a cohesive improvement.