Enabling Authentication does not close all logged in socket connections immediately

Summary

### Summary This is basically [GHSA-88j4-pcx8-q4q](https://github.com/louislam/uptime-kuma/security/advisories/GHSA-88j4-pcx8-q4q3) but instead of changing passwords, when enabling authentication. ### PoC - Open Uptime Kuma with authentication disabled - Enable authentication using another window - Access the platform using the previously logged-in window - Note that access (read-write) remains despite the enabled authentication - Expected behaviour: - After enabling authentication, all previously connected sessions should be invalidated, requiring users to log in. - Actual behaviour: - The system retains sessions and never logs out users unless explicitly done by clicking logout or refreshing the page. ### Impact See [GHSA-g9v2-wqcj-j99g](https://github.com/louislam/uptime-kuma/security/advisories/GHSA-g9v2-wqcj-j99g) and [GHSA-88j4-pcx8-q4q](https://github.com/louislam/uptime-kuma/security/advisories/GHSA-88j4-pcx8-q4q3) TBH this is quite a niche edge case, so I don't know if this even warrants a security report.