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 a new column `subscriptions_locked` to the `customers` table to manage subscription access.
- Implemented a script to create new modules from a template, including updates to various files (module.json, README.md, router.py, views.py, and migration SQL).
- Developed a script to import BMC Office subscriptions from an Excel file into the database, including error handling and statistics reporting.
- Created a script to lookup and update missing CVR numbers using the CVR.dk API.
- Implemented a script to relink Hub customers to e-conomic customer numbers based on name matching.
- Developed scripts to sync CVR numbers from Simply-CRM and vTiger to the local customers database.
