schema

Design or reshape this repo+branch's knowledge-graph schema (its ontology) — the one human-in-the-loop seam of the self-maintaining KB. Use when the user wants to set up, review, or re-design the KG schema, when a drift offer was surfaced ("your graph has drifted… reshape it?"), or proactively to check whether the ontology still fits what's been collected. Calls br8n_schema_drift to decide cold-start vs drift, then…