SPRINGFIELD — Gov. J.B. Pritzker’s second-term legislative agenda will kick off in earnest next week as he proposes his fifth annual state budget to lawmakers in the General Assembly.But while a governor’s proposal usually provides the framework for the state’s annual spending plan, it rarely makes it through the General Assembly untouched by lawmakers who have their own spending priorities.The monthslong negotiating process involves dozens of budget hearings and behind-closed-doors meetings …