fix(simulation): Clippy cleanup and CI enforcement (#635)

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>

server/src/simulation/mod.rs

@@ -32,9 +32,9 @@ pub mod save_state;
 pub mod sound;
 pub mod spatial;
 pub mod stance;
+pub mod ticker;
 pub mod tier;
 pub mod time;
-pub mod ticker;
 pub mod triangle;
 pub mod zone;