Two follow-up fixes from the code review:
1. **Unified lock key for markAsDisconnected / markAsTokenExpired.**
Both methods now use `social_account_status:{id}` instead of
different keys. Prevents the race where `markAsDisconnected` and
`markAsTokenExpired` could run concurrently on the same account
(publish-time vs verify-batch-time), causing overlapping updates and
duplicate notifications.
2. **i18n for notification title/body in markAsTokenExpired and
markAsDisconnected.** Strings were previously hardcoded in English.
Added `notifications.account_disconnected.{title,body}` and
`notifications.account_token_expired.{title,body}` in en, pt-BR, es.
Follows the project convention (e.g. `Mail/PostPublished`) of
concatenating the `@` prefix in PHP before passing the username to
the translation placeholder, instead of putting `@:account` in the
lang file.
a37eb6ae9e