feat(statsd): reintroduce metrics for envelope items

relay-server/src/endpoints/common.rs

@@ -325,11 +325,22 @@ pub async fn handle_envelope(
     state: &ServiceState,
     envelope: Box<Envelope>,
 ) -> Result<Option<EventId>, BadStoreRequest> {
+    let client_name = envelope.meta().client_name();
     for item in envelope.items() {
         metric!(
             histogram(RelayHistograms::EnvelopeItemSize) = item.payload().len() as u64,
             item_type = item.ty().name()
         );
+        metric!(
+            counter(RelayCounters::EnvelopeItems) += 1,
+            item_type = item.ty().name(),
+            sdk = client_name.name(),
+        );
+        metric!(
+            counter(RelayCounters::EnvelopeItemBytes) += item.payload().len() as u64,
+            item_type = item.ty().name(),
+            sdk = client_name.name(),
+        );
     }
 
     if state.memory_checker().check_memory().is_exceeded() {

relay-server/src/statsd.rs

@@ -649,6 +649,10 @@ pub enum RelayCounters {
     ///  - `handling`: Either `"success"` if the envelope was handled correctly, or `"failure"` if
     ///    there was an error or bug.
     EnvelopeRejected,
+    /// Number of items we processed per envelope.
+    EnvelopeItems,
+    /// Number of bytes we processed per envelope item.
+    EnvelopeItemBytes,
     /// Number of _envelopes_ the envelope buffer ingests.
     BufferEnvelopesWritten,
     /// Number of _envelopes_ the envelope buffer produces.
@@ -852,6 +856,8 @@ impl CounterMetric for RelayCounters {
             RelayCounters::EventCorrupted => "event.corrupted",
             RelayCounters::EnvelopeAccepted => "event.accepted",
             RelayCounters::EnvelopeRejected => "event.rejected",
+            RelayCounters::EnvelopeItems => "event.items",
+            RelayCounters::EnvelopeItemBytes => "event.item_bytes",
             RelayCounters::BufferEnvelopesWritten => "buffer.envelopes_written",
             RelayCounters::BufferEnvelopesRead => "buffer.envelopes_read",
             RelayCounters::BufferEnvelopesReturned => "buffer.envelopes_returned",