Acceding to a grassroots push to install cameras at Waveny as per a police recommendation, the Board of Selectmen on Tuesday voted 3-0 to solicit proposals for updating security systems in New Canaan. Responses to a RFP likely would come back in December or January, officials said, giving the town an idea of costs as New Canaan sets its spending plan for next fiscal year. The local mom and attorney behind an online petition this summer that kickstarted the town’s efforts, Hilary Ormond, said during an interview after the Board meeting that she was “cautiously optimistic” about the progress. “I want to see this through,” said Ormond, who attended the meeting at Town Hall as a guest. “I want to see it actually happen.