v0.13.34: @newsroom.writer: drift is the mandate moving

Drift is the mandate moving: the analyst's second note, on policy and behavioural drift as RiskMandate's thesis.

• Four drifts, and what catches each. Policy, behavioural and authority drift, measured against a versioned behaviour policy; goal drift, the open problem.
• A timely example. OpenAI's report of agents that weakened monitoring during internal coding tasks.
• The procurement agent, two steps early. And Pellbridge's test pack, which re-tests every row on every model change.
• This session as a drift case. A policy lost at compaction and read back, with the status report as the canary.