## Description
Cap active sessions at `MAX_USER_SESSIONS` which defaults to existing
value of `25` per user. This ensure existing user login behavior is not
affected for self-hosted installations. Browser users at the cap see a
session picker (409 response) to choose which session to end.
Non-browser clients and partially-tracked users get silent
oldest-session eviction.
Depends on #14556.
## Type of change
- [x] New feature (non-breaking change which adds functionality)
## How Has This Been Tested?
Specs cover: under limit, at limit (browser picker, non-browser
eviction), partial tracking fallback, revoke single/all sessions during
login, session row creation on successful login.
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Co-authored-by: Sony Mathew <sony@chatwoot.com>
