Fix: implement background task startup idempotency

[cryptonautt]

closes #279

Implement background task startup idempotency

Strict IP Validation: Implemented robust checks to ensure that only legitimate client IP addresses are extracted and processed by the system.

visitor IP Priority: Enforced a clear precedence order for identifying visitor locations, prioritizing secure proxy headers while maintaining a reliable fallback to the direct connection.

Process Idempotency: Added a safety mechanism to prevent the accidental startup of duplicate background workers, ensuring server resources are used efficiently.

Reliability Testing: Developed a comprehensive suite of unit tests to verify the accuracy and stability of the new security and operational features.

Codebase Synchronization: Updated the entire local environment with the latest changes from the main project branch to ensure full compatibility.

Security Audit: Identified and documented specific structural inconsistencies and logic errors in the smart contract layer to guide future stabilization efforts.

Version Control Management: Created dedicated, clean branches for all new implementations to streamline the review and merging process.

[drips-wave]

@cryptonautt Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

Learn more about application limits