Connecticut’s chief fiscal watchdog is calling for officials overseeing the investment of hundreds of millions of taxpayer and philanthropic dollars in low-performing public schools to adhere to the spirit of all disclosure and ethics laws. While Comptroller Kevin P. Lembo called the unprecedented public-private partnership, spearheaded by hedge fund giant Ray Dalio’s philanthropic foundation, “great news” for Connecticut, he warned that transparency is vital to the success of the endeavor.