Add Traffic Events Logging in Open-Source Version

[kkatiyar-jrni]

Is your feature request related to a problem? Please describe.
In self-hosted environments, there's often a strong need to track user activity for audit and compliance purposes — such as when a user connects to a peer, initiates traffic, or accesses specific internal services. Currently, there is no built-in support for traffic event logging in the open-source version of NetBird, making it difficult to maintain an audit trail.

Describe the solution you'd like
I would like to request that traffic events logging (including source peer, destination peer, timestamp, direction, and volume or protocol if possible) be included in the open-source version. This would help operators monitor user access patterns, maintain security posture, and generate audit reports for compliance.

Describe alternatives you've considered

Enterprise version may support this, but it's not viable for community or internal teams with budget or policy constraints.

Additional context
Audit logs are a standard requirement in many organizations, even for internal tools. Making basic activity logging available to the open-source community would significantly improve NetBird’s value in privacy-conscious and regulated environments.