fix(FOUR-33061): replace gettext _() with Laravel __() - #9029

PR Summary

Low Risk
Mechanical translation-helper swap with no auth or business-logic changes; low regression risk aside from verifying locale files still resolve the same keys.

Overview
Replaces PHP gettext _() with Laravel’s __() for user-facing strings in login lockout, 2FA validation/session errors, forced password change / expiry messaging, script executor Docker image delete failures, and the 2FA email notification subject.

This aligns those paths with Laravel’s translation stack and addresses php-fpm SIGSEGV on macOS (FOUR-33061) tied to gettext in those flows. User-visible copy is unchanged; only the translation helper differs.

Minor non-functional edits: PHPDoc short type names (Closure, User, MailMessage), a trailing comma in a JSON error array, and whitespace in check2faByGroups.

^{Reviewed by Cursor Bugbot for commit a12e682. Bugbot is set up for automated code reviews on this repo. Configure here.}

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarQube