When an orphan turned assassin in training disobeys killing her target, she is thrown into the lower ranks of the Assassin’s Guild, working as a servant, trying to work her way up only to discover her parents’ killer walking the hallways and finding a record that showed her village’s demise was paid-for, not random and now she must find out the reason why her village was a target, and more importantly, who was responsible for it.

Agreed with the above.
This is too long for a logline. Best you review the Training tab up top to understand what the critical components are of a logline.

Here is, in short, the key points:

Who is the main character? - clear MC description

What does he or she want? - a goal.

What is preventing them from getting what they want? - an obstacle.

Answer ONLY the above questions in a single sentence, and we will be able to help you construct a logline from that.

Hi, it does seem a little long and clunky. Recluse has done a pretty good job and making it a tighter logline.