An alleged stalker was apprehended on Saturday morning as he attempted to break into Taylor Swift’s Manhattan apartment, RadarOnline.com has learned. The man, referred to by police on the scene as “David,” was captured by the NYPD in Tribeca after an unsuccessful attempt to enter the building. The NYPD said they were reporting to a call of a “disorderly person.” However, a witness told Page Six that the man was “pretty civil” throughout the incident. “I first saw him around 1 pm, he went up to Taylor’s door,” the eyewitness said. “I’m not sure if he knocked or rang the doorbell… He didn’t re…