Guard Helm connector env vars on clientId / clientSecret → Address review feedback on access-review drivers

- Guard Helm connector env vars on clientId / clientSecret
- Decode Vercel pagination cursor as *int64
- Drop Monday probe URL — no valid GET endpoint
- Address review feedback on access-review drivers

Signed-off-by: Aurélien Sibiril <81782+aureliensibiril@users.noreply.github.com>

pkg/accessreview/drivers/heroku.go

@@ -130,8 +130,8 @@ func (d *HerokuDriver) ListAccounts(ctx context.Context) ([]AccountRecord, error
 	return nil, fmt.Errorf("cannot list all heroku accounts: %w", ErrPaginationLimitReached)
 }
 
-func (d *HerokuDriver) queryMembers(ctx context.Context, url, rangeHeader string) ([]herokuTeamMember, string, error) {
-	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
+func (d *HerokuDriver) queryMembers(ctx context.Context, endpoint, rangeHeader string) ([]herokuTeamMember, string, error) {
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, endpoint, nil)
 	if err != nil {
 		return nil, "", fmt.Errorf("cannot create heroku members request: %w", err)
 	}