Function list_activity 

pub(crate) async fn list_activity(
    __arg0: State<PgPool>,
    __arg1: Query<GlobalActivityQuery>,
) -> Result<Json<Vec<ActivityView>>, StatusCode>

GET /api/activity — global activity feed across all reflectors.

Returns activity_log rows within the since window (default 6h), ordered most-recent-first and capped at limit rows (default 50, max 500). Mirrors the per-reflector /api/reflectors/{cs}/activity endpoint but across the whole registry.