fix(spans): Correct outcome reason for invalid standalone spans

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+**Bug Fixes**:
+
+- Report invalid spans with appropriate outcome reason.
+
 ## Unreleased
 
 **Features:**

relay-server/src/services/processor/span/processing.rs

@@ -92,7 +92,12 @@ pub fn process(
 
         if let Err(e) = normalize(&mut annotated_span, normalize_span_config.clone()) {
             relay_log::debug!("failed to normalize span: {}", e);
-            return ItemAction::Drop(Outcome::Invalid(DiscardReason::Internal));
+            return ItemAction::Drop(Outcome::Invalid(match e {
+                ProcessingError::InvalidTransaction | ProcessingError::InvalidTimestamp => {
+                    DiscardReason::InvalidSpan
+                }
+                _ => DiscardReason::Internal,
+            }));
         };
 
         if let Some(span) = annotated_span.value() {