Fix remaining wsl_v5 whitespace findings (refs #61)

Insert the blank line wsl_v5 requires above `defer` and `go`
statements that share no variables with the statement above them.
Applied mechanically via `make lint-fix`; the diff is 60 added blank
lines and nothing else.

internal/cli/app.go

@@ -157,6 +157,7 @@ func RunApp(ctx context.Context, app *fx.App) error {
 
 	// Handle shutdown
 	shutdownComplete := make(chan struct{})
+
 	go func() {
 		defer close(shutdownComplete)