feat(eap): Implement gen_ai attribute transformations

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## Unreleased
+
+**Features**:
+
+- Transform deprecated `gen_ai.request.messages`, `gen_ai.response.text`, and `gen_ai.response.tool_calls` attributes into their normalized replacements (`gen_ai.input.messages` and `gen_ai.output.messages`). ([#6201](https://github.com/getsentry/relay/pull/6201))
+
 ## 26.7.0
 
 **Features**:

relay-conventions/build/attributes.rs

@@ -40,6 +40,12 @@ pub enum DeprecationStatus {
     Backfill,
     /// Only write the replacement name.
     Normalize,
+    /// Move the value to the replacement name and apply a value transformation.
+    ///
+    /// For write behavior purposes, this produces `CurrentName` — the generic attribute
+    /// renaming logic leaves these attributes alone. Dedicated transformation code handles
+    /// the full move-and-reshape.
+    Transform,
 }
 
 /// Information about an attribute's deprecation.
@@ -126,6 +132,7 @@ fn format_write_behavior(deprecation: Option<&Deprecation>) -> String {
         DeprecationStatus::Normalize => {
             format!("WriteBehavior::NewName({name})")
         }
+        DeprecationStatus::Transform => "WriteBehavior::CurrentName".to_owned(),
     }
 }
 

relay-event-normalization/src/eap/ai.rs

@@ -34,6 +34,7 @@ pub fn normalize_ai(
         return;
     }
 
+    crate::eap::gen_ai_transform::transform_gen_ai(attributes);
     normalize_model(attributes);
     normalize_ai_type(attributes);
     normalize_total_tokens(attributes);