refactor(server): apply rustfmt and clippy suggestions

Formatting pass across simulation, perception, knowledge, NPC, and
test modules. Includes two clippy fixes in monologue.rs (.values()
instead of for (_, v) pattern).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/simulation/path_follow.rs

@@ -151,10 +151,7 @@ mod tests {
                 Npc,
                 TilePosition::new(0, 0, 0),
                 ComputedPath {
-                    steps: vec![
-                        TilePosition::new(1, 0, 0),
-                        TilePosition::new(2, 0, 0),
-                    ],
+                    steps: vec![TilePosition::new(1, 0, 0), TilePosition::new(2, 0, 0)],
                     current_index: 0,
                 },
                 MovementSpeed::new(3),