The San Diego County Water Authority is offering an olive branch to the region’s largest water wholesaler in an effort to end years of public and legal feuding. Local water officials have fought for decades with the Metropolitan Water District of Southern California. The dispute has often left the two agencies fighting expensive legal battles and publicly insulting each other. Jim Madaffer, chair of the San Diego County Water Authority, said it is time to end the fighting. In a letter sent Thursday, he offered the Metropolitan Water District an agreement to end pending legal actions.