Replace CP integer ID with a UUID.

This allows unique identification across saves. The front-end needs to
be able to differentiate the first carrier in game A and the first
carrier in game B, but because carriers (and other non-airfield CPs) are
assigned IDs sequentially, collisions were to be expected. The front-end
can't tell the difference between a reloaded game and a new turn, so we
need to ensure different IDs across games.

This is a handy cleanup anyway, since callers constructing CPs no longer
need to manually track the CP ID counter.

Fixes https://github.com/dcs-liberation/dcs_liberation/issues/2078.

game/server/qt/routes.py

@@ -53,7 +53,7 @@ def show_tgo_info(
     status_code=status.HTTP_204_NO_CONTENT,
 )
 def new_cp_package(
-    cp_id: int,
+    cp_id: UUID,
     game: Game = Depends(GameContext.require),
     qt: QtCallbacks = Depends(QtContext.get),
 ) -> None:
@@ -72,7 +72,7 @@ def new_cp_package(
     status_code=status.HTTP_204_NO_CONTENT,
 )
 def show_control_point_info(
-    cp_id: int,
+    cp_id: UUID,
     game: Game = Depends(GameContext.require),
     qt: QtCallbacks = Depends(QtContext.get),
 ) -> None: