Per-fragment incoming relevance mass grouped by edge category, sorted by
mass descending: (category, strongest_source_path, mass). Shared by the
provenance dump and the locate renderer (#126) — one attribution pass,
two consumers.
Env-gated per-candidate inclusion-provenance dump (#93). One JSONL line
per scored candidate: relevance, seed distance in hops, per-edge-category
incoming mass (weight x rel(src) summed over incoming edges), and the
selection verdict. The default path costs one env probe and nothing else,
which is what keeps the instrumentation E-class.