Refresh federated index (20 capabilities, 0 duplicate warnings). Update
workplan, SCOPE, gap analysis, and tests for 59/60 publish pass. Mark
T04/T06 done; T01 remains on tegwick-control repo creation.
Note: production hub whynot URLs still need REUSE_SURFACE_TOKEN update.
Add hub sync and report cohorts CLI commands with pytest coverage, document
sibling index publish contract and hub hardening path, align INTENT layout,
raise external evidence on three registry entries, and close gap priorities
19-23 (priority 18 deferred on sibling index blocks).