* Unify peer and route ACL filtering with multi-source peer rules
* Remove partial userspace firewall mode and open foreign chains via a table-less allower
* Snapshot iptables rule maps before persisting state
* Scope userspace firewall wildcard source rules per address family
* Install nftables peer filter and mangle rules in a single transaction
* Share the iptables jump rule spec between install and cleanup
* Fix legacy ACL source wildcard and keep rollback tracking on delete failure
* Fix CI: recognize multi-value port set lookups in tests and correct PeerIP lint suppression
* Fall back to per-prefix filter rules when ipset is unavailable
* Annotate legacy PeerIP usages in ACL tests and fix import formatting
* Keep firewall rule bookkeeping in step with the kernel on replace and teardown
* Release the routing reference when the route manager shuts down
* Keep set references and rule tracking consistent when a routing rule fails
adds NetFlow functionality to track and log network traffic information between peers, with features including:
- Flow logging for TCP, UDP, and ICMP traffic
- Integration with connection tracking system
- Resource ID tracking in NetFlow events
- DNS and exit node collection configuration
- Flow API and Redis cache in management
- Memory-based flow storage implementation
- Kernel conntrack counters and userspace counters
- TCP state machine improvements for more accurate tracking
- Migration from net.IP to netip.Addr in the userspace firewall
