[fix.dirac.λ.D8+] remove insider context from FEP campaign entry

The builder exposed backend policy structure before users could establish a target, compound set, or next action. This made correct operation depend on prior internal knowledge rather than interface guidance. The chosen route is progressive disclosure with a complete eight-ligand positive control and a separate custom-project path; a tutorial overlay and weakened scientific gates were rejected because neither fixes the underlying information architecture.

Author: ivanicu