HostList.list() catches bare Exception and returns str(e) verbatim. Via host_filter, any authenticated user triggers Django FieldError (leaking complete Host model relatio…

Summary

HostList.list() catches bare Exception and returns str(e) verbatim. Via host_filter, any authenticated user triggers Django FieldError (leaking complete Host model relation graph including internal reverse accessors) or PostgreSQL DataError (leaking raw database error strings). Two primitives: credential__search=x dumps ORM schema, name__regex=[bad reflects PostgreSQL errors.