// The output gather is collaborative: every host shards its slice of
            // the view to the owning host's workers, which accumulate and emit
            // it. The accumulator's `enable_count` is per-host and is enabled
            // only when an output connector attaches, which in a multihost
            // pipeline happens only on the owning host (connectors, including
            // dynamic HTTP `listen`, are assigned to one host). A non-owning
            // host would therefore leave its accumulator disabled and send an
            // empty batch instead of its slice, silently dropping every view
            // record computed on that host.
            //
            // Enable the accumulator on every host so the gather is always
            // complete. Materialized views already get this via the integral's
            // `into_enabled_stream`; do the same for the delta gather. This
            // gathers a view even when it has no connector; a future
            // optimization could propagate the owning host's connector state to
            // the other hosts to skip that work.