Roughly, it went like this: 
 ::*Ms. Kosmodemyanskaya joined a sabotage group. 
 ::*She fulfilled some missions. 
 ::*Eventually, she failed, and the Germans caught her. 
 ::*She ended up dead, apparently with evidence that she was tortured before death. 
 ::*An inspirational heroic story was spun. 
 ::*The Party found the story useful for propaganda, and spun it larger. 
 ::*The story became the story. 

 ::So, there's both a story, and a propaganda case, and some of the propaganda appears to be truthful.  But her main cause of notability is the propaganda, and accordingly, the primary angle of the Wikipedia's article should be discussion of the propaganda.