Development record

02-adapters.md:338-359 describes lifeboat source readers with a 'probe() → extract() → copy()' contract and an adr.path config key; internal/core/lifeboat/probe.go:120-130 defines Source as a per-section, per-tier adapter (Section/Tier/Probe), and ADRs come from a fixed conventional-directory list (sources_conventions.go:149) with no adr.path key