Add human-approved automation request requirements (#177) SYS-REQ-028, REQ-094 to REQ-100, and planned tests TEST-096 to TEST-102 specify the protected-environment approval gate. Adds glossary terms and the ADR-0007 index entry (proposed in #178). Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>