Enrich a single brand or product synchronously
Forwards a single brand or product to the enrichment service’s synchronous POST /enrich and returns the enriched entity: a proposed taxonomy category, the matched known brand, normalized fields (price → minor units) and per-field confidences, for HUMAN REVIEW in the centrale before anything is saved. The centrale passes its OWN taxonomy + known brands as context (the enrichment brain reconciles + classifies against them; it never calls back into any product API). Unlike the async PDF import, this call never enqueues, so it stays available when the extraction worker is down. WHY avoid for an agent: the enrichment is a human-reviewed proposal produced by a third-party model, not a committed change — nothing here writes to the catalogue.
Authorizations
Authorization: Bearer <token>. Accepts EITHER a Keycloak access token (scopes-in-token) OR an opaque POS session token; both resolve to the same pos.* scope vocabulary the route guards enforce.

