fix(@projects/@magic-civilization): 🐛 fix deterministic player order in kills processing

Co-Authored-By: Lilith Autocommit <noreply@atlilith.com>

src/simulator/crates/mc-turn/src/processor.rs

@@ -1349,7 +1349,8 @@ impl TurnProcessor {
 
         // Remove killed units in reverse order per player to keep indices valid.
         // Credit strategic resources back to the owning player on death.
-        let mut kills_by_player: HashMap<usize, Vec<usize>> = HashMap::new();
+        // BTreeMap ensures players are processed in deterministic index order.
+        let mut kills_by_player: std::collections::BTreeMap<usize, Vec<usize>> = std::collections::BTreeMap::new();
         for &(pi, ui) in &killed {
             kills_by_player.entry(pi).or_default().push(ui);
         }