docs: Create vTiger & Simply-CRM integration setup guide with credential requirements
feat: Implement ticket system enhancements including relations, calendar events, templates, and AI suggestions
refactor: Update ticket system migration to include audit logging and enhanced email metadata
- Added Email Workflow System with automated actions based on email classification.
- Created database schema with tables for workflows, executions, and actions.
- Developed API endpoints for CRUD operations on workflows and execution history.
- Included pre-configured workflows for invoice processing, time confirmation, and bankruptcy alerts.
- Introduced user guide and workflow system improvements for better usability.
- Implemented backup system for automated backup jobs and notifications.
- Established email activity log to track all actions and events related to emails.
- Added FastAPI views for supplier invoices in the billing frontend.
- Created EconomicService for handling e-conomic API interactions, including safety modes for read-only and dry-run operations.
- Developed database migration for supplier invoices, including tables for invoices, line items, and settings.
- Documented kassekladde module features, architecture, API endpoints, and usage guide in KASSEKLADDE.md.
- Implemented views for overdue invoices and pending e-conomic sync.
