/v4/sofr-ratchet/campaign/{campaignId}

Current SOFR-spread-ratchet rate for a campaign, resolved from its own stored distribution settings (opportunityId, anchor, curve). Returns campaignApr (the baseline target or the boost gap, per the campaign's curve) plus the shared context: frozen mean TVL, last/next recalc, live SOFR, and the baseline/boosted APYs.