Introduce the SPEC section for the Mythic C2 integration layer.
Covers RBAC (RT-only, SOC=403), per-engagement Fernet-encrypted config,
c2_config + c2_task data model with ON DELETE CASCADE, full endpoint
list, output mapping rules (append-only, idempotent), 2500 ms polling
and the fake/real adapter selection via MIMIC_C2_ADAPTER.
Also patch tasks/todo.md: fix pytest baseline (256 from main, not 253),
make cascade-delete explicit, pin the MythicMeta/Mythic_Scripting source
version and document defensive base64 handling.
Closes spec-reviewer WARN-1 (SPEC ↔ plan parity), WARN-2 (cascade),
INFO-1 (pinned source), INFO-3 (baseline).
813e69ee01