fix: redesign SCUM gift item lists

plugins/examples/scum-server-plugin/schemas/bridge/reward-deliver.payload.schema.json

@@ -3,7 +3,7 @@
   "title": "SCUMRewardDeliverPayload",
   "type": "object",
   "additionalProperties": false,
-  "required": ["grantId", "playerId", "items", "operations"],
+  "required": ["grantId", "playerId", "items"],
   "properties": {
     "playerId": {
       "type": "string",
@@ -23,7 +23,9 @@
         "required": ["catalogCode", "quantity"],
         "properties": {
           "catalogCode": { "type": "string", "maxLength": 128, "pattern": "^[A-Za-z0-9_.-]{1,128}$" },
-          "quantity": { "type": "integer", "minimum": 1 }
+          "quantity": { "type": "integer", "minimum": 1 },
+          "probability": { "type": "number", "minimum": 0, "maximum": 100 },
+          "durability": { "type": "number", "minimum": 0, "maximum": 100 }
         }
       }
     },