Rename Security Assistants to Junior Detectives

[cyberTripping]

The intent of the role is to provide newer or less experienced players a way of grappling with security stuff and learning from more experienced sec players before taking on the tougher job of playing security officer itself, which is round-locked. I'd say "security assistant" is a fitting name for their purpose, and helps telegraph that it's for training thanks to parity with the other department assistants (Research Assistant, Medical Assistant, Technical Assistant).

I feel like "junior detective" would belie this purpose and give less experienced players less opportunities to learn using it, either due to them not understanding the intent of the job and not picking it, or due to others not understanding the intent of the job and filling up the slots despite not needing or being interested in the training.