By Daniel Chavkin The general manager explained where things stand between San Francisco and the free agent. Now that the NFL’s trade deadline has passed, Odell Beckham Jr. has officially become the best available player for any team looking to improve before the deadline. Representatives from the Rams, Giants, Chiefs, Cowboys and Bills have all openly acknowledged that they might be interested in signing the veteran wide receiver. Next up, is the 49ers. San Francisco general manager John Lynch left the door open for the team to potentially add Beckham in free agency this year. “Look, we never…