Must-See-TV tonight, readers, so set your Tivo’s for “A Company of Soldiers,” a “Frontline” documentary which premieres on WETA and MPT at 10 p.m. The documentary offers an intimate and often moving look into the lives of the U.S. Army’s 8th Cavalry Regiment stationed in Baghdad, during the month of November 2004. According to the NY Times’ Alessandra Stanley tonight’s documentary does not presage peace or quagmire in Iraq…Instead, a complicated war is broken down…