bug: Store API's ascending flag not working properly

[AYAHASSAN287]

Problem

ascending flag isn't working correctly

Impact

Can't retrieve pages via store API forwardly

To reproduce

1-sending 4 messages
2- Call REST API "get /store/v3/messages" with flag ascending=True and pagesize=2
2- expected : pages are returned forwardly
3-actual : pages returned backwardly

---

1-sending 4 messages
2- Call REST API "get /store/v3/messages" with flag ascending=False and pagesize=2
2- expected : pages are returned backwardly
3-actual : pages returned backwardly

---

1-sending 4 messages
2- Call REST API "get /store/v3/messages" with flag ascending="ABC" and pagesize=2
2- expected : pages are returned forwardly
3-actual : pages returned forwardly

Expected behavior

there is no way to get pages forward unless ascending flag is set to wrong value like string or special characters

nwaku version/commit hash

c5a825e