feat(server): More metric tags

relay-server/src/actors/envelopes.rs

@@ -1530,7 +1530,9 @@ impl EnvelopeProcessor {
 
                 metric!(
                     counter(RelayCounters::EventTransactionSource) += 1,
-                    source = &source.to_string()
+                    source = &source.to_string(),
+                    sdk = envelope.meta().client_name().unwrap_or("proprietary"),
+                    platform = event.platform.as_str().unwrap_or("other"),
                 );
             }
         }

relay-server/src/extractors/request_meta.rs

@@ -204,10 +204,21 @@ pub struct RequestMeta<D = PartialDsn> {
 
 impl<D> RequestMeta<D> {
     /// Returns the client that sent this event (Sentry SDK identifier).
+    ///
+    /// The client is formatted as `"sdk/version"`, for example `"raven-node/2.6.3"`.
     pub fn client(&self) -> Option<&str> {
         self.client.as_deref()
     }
 
+    /// Returns the name of the client that sent the event without version.
+    ///
+    /// If the client is not sent in standard format, this method returns `None`.
+    pub fn client_name(&self) -> Option<&str> {
+        let client = self.client()?;
+        let (name, _version) = client.split_once('/')?;
+        Some(name)
+    }
+
     /// Returns the protocol version of the event payload.
     pub fn version(&self) -> u16 {
         self.version

relay-server/src/statsd.rs

@@ -450,6 +450,9 @@ pub enum RelayCounters {
     /// The number of transaction events processed by the source of the transaction name.
     ///
     /// This metric is tagged with:
+    ///  - `platform`: The event's platform, such as `"javascript"`.
+    ///  - `sdk`: The name of the Sentry SDK sending the transaction. This tag is only set for
+    ///    Sentry's SDKs and defaults to "proprietary".
     ///  - `source`: The source of the transaction name on the client. See the [transaction source
     ///    documentation](https://develop.sentry.dev/sdk/event-payloads/properties/transaction_info/)
     ///    for all valid values.