Proof: Persist portfolio value and PnL snapshots from the live inventory and reference-price path so operators can inspect trading performance from repo-controlled data.
Assumptions: The last credited inventory snapshot before the first live command is the correct baseline for trade-driven PnL, and EURe remains explicit 1:1 with EUR.
Still fake: The new portfolio metrics and watch output are implemented and tested locally but are not live until the updated app image is deployed to k3s.
