새 K0=10.42.1.49 (탐침 안의 낡은 값=10.42.1.47)
=== 12. 본 시험 — 새 IP 를 명령줄로 넘긴다 ===
{"access_token":"<REDACTED 758자>","expires_in":60,"refresh_expires_in":1800,"refresh_token":"<REDACTED 612자>","token_type":"Bearer","not-before-policy":0,"session_state":"z_FpRg03WlwmkgqrpKZgzfNP","scope":"profile email"}
200
=== 13. DB 행의 두 시각 (갱신됐나) ===
     user_session_id      | created_on | last_session_refresh 
--------------------------+------------+----------------------
 z_FpRg03WlwmkgqrpKZgzfNP | 1789625835 |           1789625952
(1 row)