Ownership & Admin Auditor

Probes four ownership conventions, enumerates role-based access control members, and reads the EIP-1967 admin slot, because control is rarely in one place and checking only owner misses most of it. DEFAULT_ADMIN_ROLE is handled correctly: its id is zero by design rather than the hash of its name, and hashing the name instead finds nothing and makes a controlled contract look unowned. That role is called out separately because it can grant every other role including to itself. Proxies are flagged with the point that matters — renouncing ownership does not remove a proxy admin, and whoever holds that can replace the code entirely.