fix remove round used in sector

src/warchron/controller/dtos.py

@@ -62,7 +62,7 @@ class CampaignParticipantDTO:
 class SectorDTO:
     id: str
     name: str
-    round_index: int
+    round_index: int | None
     major: str
     minor: str
     influence: str
@@ -71,7 +71,7 @@ class SectorDTO:
 @dataclass
 class RoundDTO:
     id: str
-    index: int
+    index: int | None
 
 
 @dataclass(frozen=True, slots=True)