Register Business Asset

A generic, categorized config object a workflow node can attach via a config edge — a ruleset, an output schema, or any future category. Content is raw JSON today; no approval step, unlike agent registration.

CategoryOutput schema and ruleset get a guided builder below; any other category still takes raw JSON — no fixed list, a new one needs no change here.
ContentCategory-shaped — e.g. a ruleset uses {"rules": [...]}, an output schema uses {"json_schema": {...}}. "output_schema" and "ruleset" categories are validated server-side on save.