Idempotency-Key 校验错误保留请求上下文

- server-rs/crates/api-server/src/tripo3d/routes.rs：require_idempotency_key 增加 request_context 参数，缺失 / 格式非法的两个 400 改用 into_response_with_context(Some(..))，与同处理器其它校验、定价错误一致；此前传 None，客户端拿不到请求 ID / 关联标识

验证：cargo test -p api-server --locked idempotency_key（相关 6 个用例全绿）

server-rs/crates/api-server/src/tripo3d/routes.rs

@@ -58,7 +58,7 @@ pub(crate) async fn submit_text_to_model(
     payload: Result<Json<Model3dTextToModelRequest>, JsonRejection>,
 ) -> Result<(StatusCode, Json<serde_json::Value>), Response> {
     let payload = parse_json_payload(&request_context, payload)?;
-    let idempotency_key = require_idempotency_key(&headers)?;
+    let idempotency_key = require_idempotency_key(&headers, &request_context)?;
     let query = validate_text_to_model_request(&payload)
         .map_err(map_request_error)
         .map_err(|error| error.into_response_with_context(Some(&request_context)))?;
@@ -86,7 +86,7 @@ pub(crate) async fn submit_image_to_model(
     payload: Result<Json<Model3dImageToModelRequest>, JsonRejection>,
 ) -> Result<(StatusCode, Json<serde_json::Value>), Response> {
     let payload = parse_json_payload(&request_context, payload)?;
-    let idempotency_key = require_idempotency_key(&headers)?;
+    let idempotency_key = require_idempotency_key(&headers, &request_context)?;
     let query = validate_image_to_model_request(&payload)
         .map_err(map_request_error)
         .map_err(|error| error.into_response_with_context(Some(&request_context)))?;
@@ -172,7 +172,10 @@ fn target_source_entity_id(
 }
 
 /// 两个提交都必须显式给出 `Idempotency-Key`；缺失或格式非法一律 400，不静默生成键。
-fn require_idempotency_key(headers: &HeaderMap) -> Result<&str, Response> {
+fn require_idempotency_key<'a>(
+    headers: &'a HeaderMap,
+    request_context: &RequestContext,
+) -> Result<&'a str, Response> {
     let value = headers
         .get("idempotency-key")
         .and_then(|value| value.to_str().ok())
@@ -184,7 +187,7 @@ fn require_idempotency_key(headers: &HeaderMap) -> Result<&str, Response> {
                     "provider": super::provider::TRIPO_PROVIDER,
                     "message": "3D 生成提交必须携带 Idempotency-Key 请求头。",
                 }))
-                .into_response_with_context(None)
+                .into_response_with_context(Some(request_context))
         })?;
     if value.len() > 128 || !value.bytes().all(|byte| (0x21..=0x7e).contains(&byte)) {
         return Err(AppError::from_status(StatusCode::BAD_REQUEST)
@@ -192,7 +195,7 @@ fn require_idempotency_key(headers: &HeaderMap) -> Result<&str, Response> {
                 "provider": super::provider::TRIPO_PROVIDER,
                 "message": "Idempotency-Key 必须是 1-128 个可打印 ASCII 字符，且不能包含空格。",
             }))
-            .into_response_with_context(None));
+            .into_response_with_context(Some(request_context)));
     }
     Ok(value)
 }
@@ -215,23 +218,29 @@ mod tests {
 
     #[test]
     fn idempotency_key_is_required_and_validated() {
+        let request_context = RequestContext::new(
+            "request-idempotency-key".to_string(),
+            "test".to_string(),
+            std::time::Duration::ZERO,
+            false,
+        );
         let missing = HeaderMap::new();
-        assert!(require_idempotency_key(&missing).is_err());
+        assert!(require_idempotency_key(&missing, &request_context).is_err());
 
         let mut headers = HeaderMap::new();
         headers.insert("idempotency-key", HeaderValue::from_static("issue-1"));
         assert_eq!(
-            require_idempotency_key(&headers).expect("合法键应通过"),
+            require_idempotency_key(&headers, &request_context).expect("合法键应通过"),
             "issue-1"
         );
 
         let mut blank = HeaderMap::new();
         blank.insert("idempotency-key", HeaderValue::from_static("  "));
-        assert!(require_idempotency_key(&blank).is_err());
+        assert!(require_idempotency_key(&blank, &request_context).is_err());
 
         let mut spaced = HeaderMap::new();
         spaced.insert("idempotency-key", HeaderValue::from_static("a b"));
-        assert!(require_idempotency_key(&spaced).is_err());
+        assert!(require_idempotency_key(&spaced, &request_context).is_err());
     }
 
     /// 两个路由必须真的挂在应用路由上并走统一鉴权：路径写错或漏 merge 会退化成 404。