A 12 year old Queens girl was sexually assaulted in a horrifying daytime attack as she took a backyard shortcut on her way to school yesterday.  The Orthodox Jewish girl was on her way to a friend’s house to catch a ride to the Torah Academy for Girls on Beach Sixth Street in Far Rockaway when a man suddenly appeared and assaulted her at 8 a.m.  She told investigators that after she was pulled into an alley and knocked to the ground, her attacker, who she could describe only as