fix(pricing): fallback to direct fetch after proxy transport errors

scripts/official_pricing_import_common.go

@@ -8,6 +8,7 @@ import (
 	"html"
 	"io"
 	"net/http"
+	"net/url"
 	"os"
 	"regexp"
 	"strings"
@@ -343,7 +344,18 @@ func fetchRawPricingPageOnce(url string, client *http.Client, opts officialPrici
 
 	resp, err := client.Do(req)
 	if err != nil {
-		return "", isRetriablePricingFetchError(err), fmt.Errorf("fetch %s: %w", url, err)
+		if fallbackClient, ok := pricingFetchDirectFallbackClient(client, url); ok {
+			fallbackResp, fallbackErr := fallbackClient.Do(req.Clone(req.Context()))
+			if fallbackErr == nil {
+				resp = fallbackResp
+				err = nil
+			} else {
+				err = fallbackErr
+			}
+		}
+		if err != nil {
+			return "", isRetriablePricingFetchError(err), fmt.Errorf("fetch %s: %w", url, err)
+		}
 	}
 	defer resp.Body.Close()
 
@@ -385,6 +397,34 @@ func isRetriablePricingFetchError(err error) bool {
 	return false
 }
 
+func pricingFetchDirectFallbackClient(baseClient *http.Client, rawURL string) (*http.Client, bool) {
+	if baseClient == nil || !pricingFetchProxyConfigured() {
+		return nil, false
+	}
+	parsed, err := url.Parse(rawURL)
+	if err != nil {
+		return nil, false
+	}
+	if parsed.Scheme != "http" && parsed.Scheme != "https" {
+		return nil, false
+	}
+	transport := http.DefaultTransport.(*http.Transport).Clone()
+	if custom, ok := baseClient.Transport.(*http.Transport); ok && custom != nil {
+		transport = custom.Clone()
+	}
+	transport.Proxy = nil
+	return &http.Client{Timeout: baseClient.Timeout, Transport: transport}, true
+}
+
+func pricingFetchProxyConfigured() bool {
+	for _, key := range []string{"HTTP_PROXY", "HTTPS_PROXY", "ALL_PROXY", "http_proxy", "https_proxy", "all_proxy"} {
+		if strings.TrimSpace(os.Getenv(key)) != "" {
+			return true
+		}
+	}
+	return false
+}
+
 func cleanHTMLText(raw string) string {
 	tagPattern := regexp.MustCompile(`(?is)<[^>]+>`)
 	spacePattern := regexp.MustCompile(`[ \t]+`)