AI Records: credential inheritance shipped

AI Records — the structured-memory substrate with trust scoring — now inherits credentials cleanly, so agent memory respects the same partition ACLs as everything else.

AI Records is the memory layer AI workers read and write as they operate across the platform: trust-scored (1-5), versioned with supersede semantics, content-hashed, and metered per row for token/cost. The latest change makes records inherit credentials from the entity they attach to, so an agent's memory is governed by exactly the same org/partition/row/column checks as the underlying data — no separate access path to reason about.