*Background* The snowflake algorithm in the request-id plugin introduces an unnecessary dependency on etcd. This will significantly affect APISIX performance if etcd is unavailable.
Snowflake depends on a unique worker_id, which is acquired from etcd. If etcd fails, each request with request-id plugin that uses the snowflake algorithm needs to try to retrieve a unique worker_id. This has a significant impact on performance. In addition, the data plane may not have access to etcd. This limitation would make the algorithm completely unusable. In the request-id scenario, uuid can generate a globally unique id, which is enough for this case. So I suggest removing this algorithm from the request-id plugin. There are some benefits here: 1. reduce code complexity and the maintenance burden 2. remove dependency on etcd on the data plane 3. reduce the potential instability of request-id that may affect user business
