chore: bump version to 0.7.0

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: north-echo

cmd/fluxgate/main.go

@@ -27,7 +27,7 @@ import (
 	"github.com/spf13/cobra"
 )
 
-var version = "0.6.0"
+var version = "0.7.0"
 
 func main() {
 	rootCmd := &cobra.Command{