Added strict typing with parameter types, return types, and property types across all core classes: - helpers: Database, ErrorHandler, CacheHelper - models: TicketModel, UserModel, WorkflowModel, TemplateModel, UserPreferencesModel - middleware: RateLimitMiddleware, CsrfMiddleware, SecurityHeadersMiddleware Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Create CsrfMiddleware.php with token generation and validation - Add database indexes for ticket_comments and audit_log - Includes rollback script for safe deployment Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>