v4.54.1 — Tightened Down

Under-the-hood only — nothing changes for collectors. The market-price refresh cadence (how often a casting's value is re-checked against recent sold listings) is now a per-environment setting, so it can be tuned to monthly or quarterly without a code change. The default is unchanged (monthly), and it's kept separate from the identity/spec clock so pricing can move on its own schedule.