feat(ci): add tracing::instrument to heavy per-tick systems, fix stale protocol comment (#344, #527)

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

server/src/simulation/path_follow.rs

@@ -48,6 +48,7 @@ impl MovementSpeed {
 
 /// System: NPC entities with ComputedPath advance along their path.
 /// Creates MoveIntent for the next step. Removes ComputedPath when complete.
+#[tracing::instrument(level = "debug", skip_all)]
 pub fn follow_paths(
     mut commands: Commands,
     mut query: Query<(Entity, &mut ComputedPath, Option<&mut MovementSpeed>), With<Npc>>,