feat: add authz-adapter service and Envoy ext_authz integration

- Implemented authz-adapter deployment and service for Envoy gRPC authorization.
- Created PowerShell script to generate JWK for JWT authentication.
- Documented the integration of ext_authz with user-rpc.ValidateToken in ENVOY_EXT_AUTHZ_ADAPTER.md.
- Added comprehensive Envoy Gateway configuration guide with JWT authentication and access control in ENVOY_GATEWAY_GUIDE.md.

app/users/api/internal/handler/user/registerHandler.go

@@ -46,9 +46,9 @@ func RegisterHandler(svcCtx *svc.ServiceContext) http.HandlerFunc {
 		resp, err := l.Register(&req)
 
 		if err != nil {
-			httpx.ErrorCtx(r.Context(), w, err)
+			httpx.ErrorCtx(r.Context(), w, utils.NewErrorResp(400, err))
 		} else {
-			httpx.OkJsonCtx(r.Context(), w, utils.NewErrorResp(400, err))
+			httpx.OkJsonCtx(r.Context(), w, resp)
 		}
 	}
 }