~anthropic/claude-sonnet-latest → B (8:2)

Side B delivers a substantial, coherent feature: it converts entity fetch from an implicit auto-fetch to an explicit user-initiated, event-sourced import (EntityImported event, replay support, configurable API base for testing, dotenv support), plus real tests and an integration test harness with fixtures. Side A is a smaller refactor (Deque->Vec/List) that removes an eager trim optimization in favor of a query-time cap, which is reasonable but much lower impact and scope than B's architectural and testability improvements.