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/npc/interaction.rs

@@ -82,7 +82,10 @@ impl InteractionMemory {
 
     /// Count notable events of a given kind.
     pub fn count_events(&self, kind: InteractionEventKind) -> usize {
-        self.notable_events.iter().filter(|e| e.kind == kind).count()
+        self.notable_events
+            .iter()
+            .filter(|e| e.kind == kind)
+            .count()
     }
 }