♻️(backend) remove unnecessary manipulation of the room name

Avoided unnecessary manipulation of the room name to prevent issues when
starting an egress worker. Previously, hyphens were stripped from the room
name, likely inherited from the legacy setup with Jitsi in Magnify, though
the purpose of this change is unclear and might be an undesired legacy
feature.

To ensure accurate room matching during egress worker requests, this update
removes any manipulation of the room name. This approach minimizes the risk
of errors when initiating recordings and maintains the integrity of the
original room name throughout the process.

src/backend/core/api/serializers.py

@@ -130,8 +130,7 @@ class RoomSerializer(serializers.ModelSerializer):
             del output["configuration"]
 
         if role is not None or instance.is_public:
-            slug = f"{instance.id!s}".replace("-", "")
-
+            slug = f"{instance.id!s}"
             username = request.query_params.get("username", None)
 
             output["livekit"] = {