chore: post dependency upgrade fixes

backend/internal/utils/testing/round_tripper.go

@@ -3,9 +3,11 @@
 package testing
 
 import (
+	"bytes"
 	"io"
 	"net/http"
 	"strings"
+	"sync"
 
 	_ "github.com/golang-migrate/migrate/v4/source/file"
 )
@@ -14,25 +16,62 @@ import (
 type MockRoundTripper struct {
 	Err       error
 	Responses map[string]*http.Response
+
+	mu             sync.Mutex
+	responseBodies map[string][]byte
 }
 
 // RoundTrip implements the http.RoundTripper interface
 func (m *MockRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
+	if m.Err != nil {
+		return nil, m.Err
+	}
+
 	// Check if we have a specific response for this URL
 	for url, resp := range m.Responses {
 		if req.URL.String() == url {
-			return resp, nil
+			return m.cloneResponse(url, resp)
 		}
 	}
 
 	return NewMockResponse(http.StatusNotFound, ""), nil
 }
 
+func (m *MockRoundTripper) cloneResponse(url string, resp *http.Response) (*http.Response, error) {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	if m.responseBodies == nil {
+		m.responseBodies = make(map[string][]byte, len(m.Responses))
+	}
+
+	body, ok := m.responseBodies[url]
+	if !ok {
+		var err error
+		body, err = io.ReadAll(resp.Body)
+		if err != nil {
+			return nil, err
+		}
+
+		m.responseBodies[url] = body
+		resp.Body = io.NopCloser(bytes.NewReader(body))
+	}
+
+	cloned := new(http.Response)
+	*cloned = *resp
+	cloned.Header = resp.Header.Clone()
+	cloned.Body = io.NopCloser(bytes.NewReader(body))
+	cloned.ContentLength = int64(len(body))
+
+	return cloned, nil
+}
+
 // NewMockResponse creates an http.Response with the given status code and body
 func NewMockResponse(statusCode int, body string) *http.Response {
 	return &http.Response{
-		StatusCode: statusCode,
-		Body:       io.NopCloser(strings.NewReader(body)),
-		Header:     make(http.Header),
+		StatusCode:    statusCode,
+		Body:          io.NopCloser(strings.NewReader(body)),
+		Header:        make(http.Header),
+		ContentLength: int64(len(body)),
 	}
 }