neatlogs integration check (organizer prompt 3b): spans carry input, output, status

Ran the official neatlogs setup prompt against FirstRun. Gates 1, 2, 3 and 5 pass, gate 4 partial. Step, recovery, budget and verify spans now carry input and output and mark errors. The run root records the run result. read_docs is named read_docs. Coverage table and evidence trace IDs are in docs/neatlogs-integration.md.