Fix all Clippy warnings across the server codebase (2411 insertions, 1341
deletions). Raise type-complexity-threshold to 750 and too-many-arguments
to 12 in .clippy.toml for idiomatic Bevy ECS system signatures. The server
now passes `cargo clippy -- --deny warnings` cleanly.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Add clippy::disallowed_types for std::collections::HashMap scoped to
the simulation crate. Replace HashMap with BTreeMap in movement.rs for
deterministic iteration order. Allow exception in perception/query.rs
where iteration order is irrelevant (per-frame scratch buffer).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>