ARCHITECTURE: LazyLock, tracked Cargo.lock, dedup'd foundry.json, warnings cleared. ROADMAP: phase 0 checkboxes closed; MODERNIZE: lazy_static marked applied, rest pending.
itertools, thiserror, anyhow, pretty_env_logger, dotenvy stay for certain; the rest of the unused-dependency list is under consideration.
Verified dependency reductions (13 unused or replaceable crates) and idiomatic cleanups for the current codebase. Not applied yet; linked from ROADMAP phase 0. Toolchain stays on nightly.
