ref(processing): Move event processing functions (#5309)

Author: jjbayer

relay-server/src/envelope/mod.rs

@@ -179,6 +179,11 @@ impl<M> EnvelopeHeaders<M> {
         &self.meta
     }
 
+    /// Returns the event ID of the envelope, if any.
+    pub fn event_id(&self) -> Option<EventId> {
+        self.event_id
+    }
+
     /// Returns the dynamic sampling context from envelope headers, if present.
     pub fn dsc(&self) -> Option<&DynamicSamplingContext> {
         match &self.trace {

relay-server/src/metrics_extraction/event.rs

@@ -10,7 +10,7 @@ use relay_sampling::evaluation::SamplingDecision;
 
 use crate::metrics_extraction::generic::{self, Extractable};
 use crate::metrics_extraction::transactions::ExtractedMetrics;
-use crate::services::processor::extract_transaction_span;
+use crate::processing::utils::event::extract_transaction_span;
 use crate::statsd::RelayTimers;
 
 impl Extractable for Event {