Add support for alternative database with intensive testing

[justogm]

Feature Request:
Add support for using an alternative database in RemoteGazeUX. The implementation should be robust and flexible enough to allow easy switching or integration with different database systems.

Requirements:

• Implement the necessary infrastructure and configuration to allow the use of alternative databases.
• Ensure compatibility with current system functions and features.
• Provide clear documentation for configuring and using an alternative database backend.

Testing:

• Develop and execute intensive testing procedures to guarantee stability, reliability, and performance when using different database engines.
• Include unit, integration, and stress tests for all database-related functions.
• Document all testing outcomes for future reference.

Notes:

• This enhancement should not affect existing users using the current database.
• Consider community recommendations for database choices if possible.

Please prioritize strong coverage and reliability in tests.