fix empty agreements at first debate sub-round

Author: jonas-becker

mallm/discussion_paradigms/debate.py

@@ -120,7 +120,8 @@ def discuss(
                 logger.debug(
                     f"Discussion {coordinator.id} goes into debate round: {r!s}"
                 )
-                debate_agreements: list[Agreement] = []
+                if r == 0:
+                    debate_agreements = self.agreements
                 for i, a in enumerate(
                     coordinator.agents[1:]
                 ):  # similar to relay paradigm