Function emit_dataplane_span 

pub fn emit_dataplane_span(
    trace_context: TraceContext,
    kind: DataplaneSpanKind,
    operation: &str,
    outcome: &str,
    resource_kind: ResourceKind,
    lease_id: Option<u128>,
    start_time_unix_us: u64,
    end_time_unix_us: u64,
)

Emit a data-plane span through grafos-observe’s shared span exporter.