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/pressure.rs

@@ -163,7 +163,7 @@ pub fn update_character_pressure(
     mut player_query: Query<(Entity, &mut CharacterPressure), With<PlayerCharacter>>,
 ) {
     // Only run on interval ticks
-    if time.tick % PRESSURE_UPDATE_INTERVAL != 0 {
+    if !time.tick.is_multiple_of(PRESSURE_UPDATE_INTERVAL) {
         return;
     }
 
@@ -210,8 +210,8 @@ mod tests {
     use crate::npc::relationships::{RelationshipEdge, RelationshipGraph};
     use crate::npc::{Npc, RelationshipKind};
     use crate::simulation::movement::PlayerCharacter;
-    use crate::simulation::time::SimulationTime;
     use crate::simulation::tier::ActiveSim;
+    use crate::simulation::time::SimulationTime;
     use bevy_ecs::world::World;
 
     fn setup_world() -> World {
@@ -251,7 +251,10 @@ mod tests {
 
         let mut q = world.query::<&CharacterPressure>();
         let pressure = q.single(&world).unwrap();
-        assert_eq!(pressure.exposure, 0, "should not update on non-interval tick");
+        assert_eq!(
+            pressure.exposure, 0,
+            "should not update on non-interval tick"
+        );
     }
 
     #[test]
@@ -301,11 +304,7 @@ mod tests {
         }
         // 2 non-suspicious NPCs
         for _ in 0..2 {
-            world.spawn((
-                Npc,
-                ActiveSim,
-                PlayerAwareness::default(),
-            ));
+            world.spawn((Npc, ActiveSim, PlayerAwareness::default()));
         }
 
         world.spawn((PlayerCharacter, CharacterPressure::default()));