[Bug]: Some request from an xline client won't be checked in KvStore

[Phoenix500526]

Description about the bug

Currently, Xline supports two different clients: the etcd client and the Xline client.

For the etcd client, its request path is as follows:
etcd client — RPC call —> KvServer — inner client propose —> CurpServer —> Command Executor —> KvStore

For the Xline client, its request path is as follows:
Xline client — outer client —> CurpServer —> Command Executor —> KvStore

As shown in the request paths above, Xline client requests do not pass through KvServer. Therefore, some backend-related request checks, such as check_range_request, are not invoked when interacting with an Xline client and Xline. Hence, we need to add the corresponding request checks to KvStore based on the request path of the Xline client.

Version

0.4.1 (Default)

Relevant log output

No response

Code of Conduct

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[Phoenix500526]

Same as issue #398, and resolved in pr #394