refactor: improve network interface validation

Add context parameter to validInterfacesMap for better error handling and
logging. Move Windows-specific network adapter validation logic to the
ctrld package. Key changes include:

- Add context parameter to validInterfacesMap across all platforms
- Move Windows validInterfaces to ctrld.ValidInterfaces
- Improve error handling for virtual interface detection on Linux
- Update all callers to pass appropriate context

This change improves error reporting and makes the interface validation
code more maintainable across different platforms.

cmd/cli/dns_proxy.go

@@ -1201,7 +1201,7 @@ func (p *prog) monitorNetworkChanges(ctx context.Context) error {
 
 	mon.RegisterChangeCallback(func(delta *netmon.ChangeDelta) {
 		// Get map of valid interfaces
-		validIfaces := validInterfacesMap()
+		validIfaces := validInterfacesMap(ctrld.LoggerCtx(ctx, p.logger.Load()))
 
 		isMajorChange := mon.IsMajorChangeFrom(delta.Old, delta.New)