ref(cogs): Tag processing time by processing function (#3107)

Moves the envelope processing timer to the actual processing of each
group.

relay-server/src/services/processor.rs

@@ -288,6 +288,23 @@ impl ProcessingGroup {
 
  grouped_envelopes
  }
+
+ /// Returns the name of the group.
+ pub fn variant(&self) -> &'static str {
+ match self {
+ ProcessingGroup::Transaction(_) => "transaction",
+ ProcessingGroup::Error(_) => "error",
+ ProcessingGroup::Session(_) => "session",
+ ProcessingGroup::Standalone(_) => "standalone",
+ ProcessingGroup::ClientReport(_) => "client_report",
+ ProcessingGroup::Replay(_) => "replay",
+ ProcessingGroup::CheckIn(_) => "check_in",
+ ProcessingGroup::Span(_) => "span",
+ ProcessingGroup::Metrics(_) => "metrics",
+ ProcessingGroup::ForwardUnknown(_) => "forward_unknown",
+ ProcessingGroup::Ungrouped(_) => "ungrouped",
+ }
+ }
 }
 
 /// An error returned when handling [`ProcessEnvelope`].
@@ -1512,7 +1529,8 @@ impl EnvelopeProcessorService {
  let wait_time = message.envelope.start_time().elapsed();
  metric!(timer(RelayTimers::EnvelopeWaitTime) = wait_time);
 
- let result = metric!(timer(RelayTimers::EnvelopeProcessingTime), {
+ let group = message.envelope.group().variant();
+ let result = metric!(timer(RelayTimers::EnvelopeProcessingTime), group = group, {
  self.process(message)
  });
  match result {