A benefits team can be responsible for a major share of an employer's spending while still assembling renewal decisions from spreadsheets, claims reports, contracts and email threads. Avante has raised a $30 million Series A to connect that information with AI agents that investigate programs, prepare work for review and help employees use the benefits already available to them. Frist Cressey Ventures led the round, joined by new investors Sorenson Capital, Hearst Ventures and the Morgan…