feat: Configure a 10GB body limit for uploads and enhance attachment processing with a 100MB image size cap and improved error handling.

src/main.rs

@@ -120,7 +120,8 @@ async fn main() {
         .route("/__attachments/{id}", get(handlers::attachments::serve_attachment))
         .nest("/__dungeon", handlers::router(&app_state)) // I'll create a single `handlers::router`
         .with_state(app_state.clone())
-        .layer(axum::extract::DefaultBodyLimit::disable())
+        .layer(axum::extract::DefaultBodyLimit::max(10 * 1024 * 1024 * 1024)) // 10GB limit to be safe
+
         .layer(tower_http::trace::TraceLayer::new_for_http());
 
     let listener = TcpListener::bind(&addr).await.unwrap();