debt-clean

One repeatable, evidence-backed pass that retires a bounded batch of maturity debt worst-first across the system's dedicated debt lanes. Features rich queryability (--query, --health), cross-indexes related items (dual-repo companions, tests, runtime-proofs, benchmarks, inbound blast radius), targets high-carrying-cost or degraded hotspots, advances maturity with tests, integration, and benchmarks, re-measures with…