f32e166601
Each indexed event is one entry in the backend's settings dataset, default graph (an undeclared named graph is kept in memory by fuseki and lost on restart): the item JSON verbatim plus its first-index time, written by one atomic upsert, so concurrent re-adds stay one entry. The catalog now has its own delete matcher, because the platform one compares formerType as:Event to the compacted Event and never fired: an owner's deletion removes the entry, also after a restart. GET /catalog keeps its shape.