make context optional

Signed-off-by: eternal-flame-AD <yume@yumechi.jp>

src/evaluate/mod.rs

@@ -1,7 +1,6 @@
 use axum::response::IntoResponse;
 use reqwest::StatusCode;
 use serde::Serialize;
-use serde_json::Value;
 
 /// Chain evaluation modules
 pub mod chain;

src/model/ap.rs

@@ -46,7 +46,7 @@ impl<O> IntoIterator for FlatArray<O> {
 #[allow(missing_docs)]
 pub struct Object {
     #[serde(rename = "@context")]
-    pub context: FlatArray<Either<String, serde_json::Value>>,
+    pub context: Option<FlatArray<Either<String, serde_json::Value>>>,
     pub id: String,
     #[serde(rename = "type")]
     pub ty_: String,