统一 nanobanana 执行器的 provider 标签

取消 create_nanobanana_generate_content 中硬编码的 VectorEngine

错误、重试与审计统一读取 settings.provider

server-rs/crates/platform-image/src/image_provider/runtime/executor.rs

@@ -305,7 +305,7 @@ pub async fn create_nanobanana_generate_content(
             effective_request_timeout_ms(settings.request_timeout_ms, settings.request_deadline)
         else {
             return Err(request_budget_exhausted_error(
-                ImageProvider::VectorEngine,
+                settings.provider,
                 request_url.as_str(),
                 failure_context,
                 None,
@@ -329,7 +329,7 @@ pub async fn create_nanobanana_generate_content(
                     attempt,
                 ) {
                     if retry_image_upstream_status_after_delay(
-                        ImageProvider::VectorEngine,
+                        settings.provider,
                         "nanobanana_generate_content",
                         request_url.as_str(),
                         attempt,
@@ -352,7 +352,7 @@ pub async fn create_nanobanana_generate_content(
             Err(error) => {
                 if should_retry_image_curl_send_error(&error, attempt) {
                     if retry_image_send_after_delay(
-                        ImageProvider::VectorEngine,
+                        settings.provider,
                         "nanobanana_generate_content",
                         request_url.as_str(),
                         "request_send",
@@ -375,7 +375,7 @@ pub async fn create_nanobanana_generate_content(
                     }
                 }
                 return Err(map_curl_error(
-                    ImageProvider::VectorEngine,
+                    settings.provider,
                     format!("{failure_context}：创建 nanobanana2 图片生成任务失败").as_str(),
                     request_url.as_str(),
                     "request_send",
@@ -410,7 +410,7 @@ pub async fn create_nanobanana_generate_content(
     handle_image_response(
         http_client,
         request_url.as_str(),
-        ImageProvider::VectorEngine,
+        settings.provider,
         response_status,
         response_text.as_str(),
         None,