feat: enhance HTTP logging and API responses with content metadata

Co-authored-by: aider (openai/andrew/openrouter/anthropic/claude-sonnet-4) <aider@aider.chat>

src/modes/server/common.rs

@@ -58,6 +58,14 @@ pub struct ItemInfo {
     pub metadata: HashMap<String, String>,
 }
 
+#[derive(Serialize, Deserialize, ToSchema)]
+pub struct ItemContentInfo {
+    #[serde(flatten)]
+    pub metadata: HashMap<String, String>,
+    pub content: Option<String>,
+    pub binary: bool,
+}
+
 #[derive(Debug, Deserialize)]
 pub struct TagsQuery {
     pub tags: Option<String>,
@@ -111,12 +119,17 @@ pub async fn logging_middleware(
 ) -> Response {
     let method = request.method().clone();
     let uri = request.uri().clone();
+    let content_length = request.headers()
+        .get("content-length")
+        .and_then(|v| v.to_str().ok())
+        .and_then(|s| s.parse::<u64>().ok())
+        .unwrap_or(0);
     
     let start = Instant::now();
     let response = next.run(request).await;
     let duration = start.elapsed();
     
-    info!("{} {} {} {} - {:?}", addr, method, uri, response.status(), duration);
+    info!("{} {} {} {} {} bytes - {:?}", addr, method, uri, response.status(), content_length, duration);
     
     response
 }