feat(stats): implement cardinality limits

datadog-ipc/src/shm_stats.rs

@@ -805,11 +805,7 @@ impl ShmSpanConcentrator {
             top_level_hits,
             span_kind: read_str!(f.span_kind),
             peer_tags,
-            is_trace_root: if f.is_trace_root {
-                pb::Trilean::True.into()
-            } else {
-                pb::Trilean::False.into()
-            },
+            is_trace_root: f.is_trace_root.into(),
             http_method: read_str!(f.http_method),
             http_endpoint: read_str!(f.http_endpoint),
             grpc_status_code: f
@@ -856,7 +852,7 @@ mod tests {
                 service_source: "",
                 http_status_code: 200,
                 is_synthetics_request: false,
-                is_trace_root: true,
+                is_trace_root: pb::Trilean::True,
                 grpc_status_code: None,
             },
             peer_tags: &[],

libdd-data-pipeline/src/trace_exporter/stats.rs

@@ -134,6 +134,7 @@ pub(crate) fn start_stats_computation<
             std::time::SystemTime::now(),
             span_kinds,
             peer_tags,
+            None,
             #[cfg(feature = "stats-obfuscation")]
             Some(client_side_stats.obfuscation_config.clone()),
         )));

libdd-trace-protobuf/build.rs

@@ -240,6 +240,8 @@ fn generate_protobuf() {
         "#[serde(rename = \"srv_src\")]",
     );
 
+    config.type_attribute("Trilean", "#[derive(Deserialize, Serialize)]");
+
     // idx module type attributes
     config.type_attribute("pb.idx.AnyValue", "#[derive(Deserialize, Serialize)]");
     config.type_attribute(

libdd-trace-protobuf/src/pb.rs

@@ -668,6 +668,7 @@ pub struct ClientGroupedStats {
     >,
 }
 /// Trilean is an expanded boolean type that is meant to differentiate between being unset and false.
+#[derive(Deserialize, Serialize)]
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, ::prost::Enumeration)]
 #[repr(i32)]
 pub enum Trilean {

libdd-trace-stats/benches/span_concentrator_bench.rs

@@ -44,6 +44,7 @@ pub fn criterion_benchmark(c: &mut Criterion) {
         now,
         vec![],
         vec!["db_name".into(), "bucket_s3".into()],
+        None,
         #[cfg(feature = "stats-obfuscation")]
         None,
     );