Include EditAgent's raw output when inspecting thread (#30337)

This allows us to debug the raw edits that were generated when people
report feedback, when running evals and when opening the thread as
Markdown.

Release Notes:

- Improved debug output for agent threads.

crates/assistant_tools/src/edit_agent.rs

@@ -20,7 +20,8 @@ use language_model::{
     LanguageModelToolChoice, MessageContent, Role,
 };
 use project::{AgentLocation, Project};
-use serde::Serialize;
+use schemars::JsonSchema;
+use serde::{Deserialize, Serialize};
 use std::{cmp, iter, mem, ops::Range, path::PathBuf, sync::Arc, task::Poll};
 use streaming_diff::{CharOperation, StreamingDiff};
 
@@ -50,10 +51,10 @@ pub enum EditAgentOutputEvent {
     OldTextNotFound(SharedString),
 }
 
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, Serialize, Deserialize, JsonSchema)]
 pub struct EditAgentOutput {
-    pub _raw_edits: String,
-    pub _parser_metrics: EditParserMetrics,
+    pub raw_edits: String,
+    pub parser_metrics: EditParserMetrics,
 }
 
 #[derive(Clone)]
@@ -186,8 +187,8 @@ impl EditAgent {
         }
 
         Ok(EditAgentOutput {
-            _raw_edits: raw_edits,
-            _parser_metrics: EditParserMetrics::default(),
+            raw_edits,
+            parser_metrics: EditParserMetrics::default(),
         })
     }
 
@@ -426,8 +427,8 @@ impl EditAgent {
                 }
             }
             Ok(EditAgentOutput {
-                _raw_edits: raw_edits,
-                _parser_metrics: parser.finish(),
+                raw_edits,
+                parser_metrics: parser.finish(),
             })
         });
         (output, rx)