virtual-vehicle: add debug logging

services/virtual-vehicle/main.go

@@ -42,6 +42,7 @@ func main() {
 	cert, key, err := registerVehicle(vin)
 	if err != nil {
 		logger.Error().Err(err).Msg("Failed to register vehicle")
+		time.Sleep(time.Second) // Allow log to flush
 		os.Exit(1)
 	}
 	logger.Info().Str("vin", vin).Msg("Vehicle registered successfully")
@@ -98,21 +99,29 @@ func registerVehicle(vin string) (cert, key string, err error) {
 	payload := map[string]string{"vin": vin}
 	body, _ := json.Marshal(payload)
 
+	logger.Debug().Str("payload", string(body)).Msg("Creating request")
+	
 	req, err := http.NewRequest("POST", manufacturerURL, bytes.NewReader(body))
 	if err != nil {
-		return "", "", err
+		return "", "", fmt.Errorf("create request: %w", err)
 	}
 	req.Header.Set("Content-Type", "application/json")
 	if apiKey != "" {
 		req.Header.Set("Api-Key", apiKey)
+		logger.Debug().Msg("API key set")
+	} else {
+		logger.Warn().Msg("No API key configured")
 	}
 
+	logger.Debug().Msg("Sending HTTP request")
 	client := &http.Client{Timeout: 30 * time.Second}
 	resp, err := client.Do(req)
 	if err != nil {
-		return "", "", err
+		return "", "", fmt.Errorf("http request: %w", err)
 	}
 	defer resp.Body.Close()
+	
+	logger.Debug().Int("status", resp.StatusCode).Msg("Got response")
 
 	if resp.StatusCode >= 300 {
 		body, _ := io.ReadAll(resp.Body)