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/tests/game_loop.rs

@@ -7,10 +7,10 @@ use settled_reach_server::bridge::tcp::TcpBridge;
 use settled_reach_server::bridge::types::*;
 use settled_reach_server::bridge::{BridgePlugin, BridgeResource};
 use settled_reach_server::knowledge::{KnowledgeGraph, KnowledgePlugin};
+use settled_reach_server::npc::relationships::TrustEventQueue;
 use settled_reach_server::simulation::interaction::NearbyInteractionBuffer;
 use settled_reach_server::simulation::monologue::{MonologueBuffer, MonologueState};
 use settled_reach_server::simulation::movement::{PlayerCharacter, TilePosition, WalkabilityMap};
-use settled_reach_server::npc::relationships::TrustEventQueue;
 use settled_reach_server::simulation::SimulationPlugin;
 use std::io::{BufReader, BufWriter};
 use std::net::{TcpListener, TcpStream};