nx_ecomat_domledger.nx

nx_ecomat_domledger.nx -- append one PER-DOMAIN beat to knowledge/status/ecomat_domains.log. This is the write half of the fix for debt 1785514540: the aggregate ledger cannot say who earned a level, so nx_ecomat_trend can only attribute 406 permil of observed movement. Once this runs on the same cadence as the rollup, every span becomes exactly attributable and that number goes to 1000 -- advancement and expansion stop being a judgement call. Additive by construction (rule 19): a NEW log, a NEW organ. It does not touch the rollup, so the crown-jewel maturity path carries zero regression risk from this change. argv[1]=store argv[2]=out_log. license_tier: ORIGINAL No hw writes (Rule 26).