job启动命令里 -p -D{{变量名}}=时间戳,在mongodbreader中使用query无法接收int类型

例如：
"query": {
"timestamp": {
"$gt": "$timestamp"
}
},
最后json会被替换为
"query": {
"timestamp": {
"$gt": "1592812259"
}
},
期望为
"query": {
"timestamp": {
"$gt": 1592812259
}
},
导致查询与预期不符合

Start by tracing how the job startup -p/-Dtimestamp parameter is substituted before the MongoDBReader query is executed. Reproduce the example and inspect the JSON conversion path; done means a numeric timestamp is passed as a number in the MongoDB query rather than as a quoted string.

Written by the indexing model from the issue text.