Parse ?lang query param in cookie banner config API

Pass the lang parameter from the request URL to the service
so the config response returns localized texts and category
names for the requested language.

Signed-off-by: Émile Ré <emile@getprobo.com>

pkg/server/api/cookiebanner/v1/handler.go

@@ -65,7 +65,9 @@ func (h *Handler) handleGetConfig(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	config, err := h.cookieBannerSvc.GetActiveBannerConfig(r.Context(), bannerID)
+	lang := r.URL.Query().Get("lang")
+
+	config, err := h.cookieBannerSvc.GetActiveBannerConfig(r.Context(), bannerID, lang)
 	if err != nil {
 		if errors.Is(err, cookiebanner.ErrBannerNotFound) {
 			jsonutil.RenderNotFound(w, fmt.Errorf("banner not found"))