A nearly $22 million mixed-use development proposed for the corner of Woodland Street and Albany Avenue in Hartford is in limbo, after the city has questioned the developer’s project financing and overall design. Development Services Interim Director I. Charles Mathews has recommended the city postpone signing a land lease with developer 7 Summits Realty LLC, which had proposed building a mixed-use development at the site that would contain up to 75 mostly affordable apartments and retail space. Mathews made that recommendation in a February memo that was reviewed Thursday by the Capital Region Development Authority, which committed $5.5 million to the project last year.