feat(environment): integrate reward_computer call in step() with mock fallback

server/environment.py

@@ -82,4 +82,21 @@ class RedTeamEnvironment:
                 "defense_score":     0.9,
                 "llm_grade":         {"overall": 3.0},
             }
+
+        # ------ Step 4: Call Person 2's reward computer ------
+        if self.reward_computer:
+            reward_result = self.reward_computer(
+                action         = action,
+                attack_history = self.attack_history,
+                llm_result     = llm_result,
+            )
+        else:
+            # Mock — lets you run the server before P2 is ready
+            logger.warning("Reward computer not wired — using mock reward")
+            reward_result = {
+                "total_reward": 0.0,
+                "novelty_score": 0.5,
+                "feedback":     "[Mock] Reward system not connected.",
+                "safety_flagged": False,
+            }
         return None # Placeholder