feat (patient): add patient employee checker

internal/lib/auth/tycovar.go

@@ -103,3 +103,7 @@ func (a AuthInfo) IsNurseIntern() bool {
 func (a AuthInfo) HasEmployeePosition() bool {
 	return a.Employee_Position_Code != nil
 }
+
+func (a AuthInfo) IsReg() bool {
+	return a.Employee_Position_Code != nil && *a.Employee_Position_Code == string(ero.EPCReg)
+}