AC:

• Remove timer().record in all the methods in LeetcodeClientImpl
• Add @Timed(value = "leetcode.client.execution") in LeetcodeClientImpl
• Remove timer().record in all the methods in LeetcodeAuthStealer
• Add @Timed(value = "leetcode.client.execution") in LeetcodeAuthStealer
• Ensure that the metrics still populate correctly in /actuator/prometheus
• Ensure that the metrics still look correct on Grafana

If you need any clarification, reach out to @Alisha Zaman