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

Side A performs a substantial, well-scoped identity/API refactor (new canonical_path.rs and identity.rs modules, strict wire-format validation without '@', reducer no longer rewrites identity, delegate becomes optional) with matching test and CLI updates across many call sites, fixing real correctness/design issues. Side B is a smaller mixed change: it removes a 'demo counter' feature and adds an async settlement worker with cached ranking scores, which is a reasonable perf/architecture improvement but is narrower in scope and partly consists of deleting throwaway demo code rather than fixing core design flaws.