~anthropic/claude-sonnet-latest → B (75:25)

Side B implements a substantial, coherent feature (Reddit OAuth linking with UUID-canonical identity, conflict handling, private linked-provider display) with corresponding storage schema changes, projection logic, and extensive mock-server test infrastructure updates. Side A mostly removes an unused demo counter feature and introduces a settlement-worker/caching refactor for ranking that adds real architectural value (batched async vote processing with cached scores), but is smaller in scope and partly consists of deleting demo scaffolding rather than building new lasting functionality.