修正 libcurl 传输错误的 provider 归属

map_curl_error 接收实际 provider，审计、日志与 Request 错误不再写死 vector-engine

executor 生成 / 编辑路径传入 settings.provider，nanobanana 路径传入 VectorEngine

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

@@ -188,6 +188,7 @@ pub async fn create_image_generation_with_model(
                 }
                 return Err(finish_image_model_fallback_error(
                     map_curl_error(
+                        settings.provider,
                         format!("{failure_context}：创建图片生成任务失败").as_str(),
                         request_url.as_str(),
                         "request_send",
@@ -377,6 +378,7 @@ pub async fn create_nanobanana_generate_content(
                     }
                 }
                 return Err(map_curl_error(
+                    ImageProvider::VectorEngine,
                     format!("{failure_context}：创建 nanobanana2 图片生成任务失败").as_str(),
                     request_url.as_str(),
                     "request_send",
@@ -629,6 +631,7 @@ pub async fn create_image_edit_with_references_and_model(
                 }
                 return Err(finish_image_model_fallback_error(
                     map_curl_error(
+                        settings.provider,
                         format!("{failure_context}：创建图片编辑任务失败").as_str(),
                         request_url.as_str(),
                         "request_send",

server-rs/crates/platform-image/src/image_provider/transport/curl.rs

@@ -7,8 +7,10 @@ use curl::{
 use serde_json::Value;
 
 use crate::image_provider::{
-    audit::build_failure_audit, constants::VECTOR_ENGINE_PROVIDER, error::PlatformImageError,
-    request::build_prompt_with_negative, types::ReferenceImage,
+    audit::build_failure_audit,
+    error::PlatformImageError,
+    request::build_prompt_with_negative,
+    types::{ImageProvider, ReferenceImage},
 };
 
 #[derive(Debug)]
@@ -145,6 +147,7 @@ pub(crate) async fn send_image_multipart_edit_request_with_curl(
 }
 
 pub(crate) fn map_curl_error(
+    provider: ImageProvider,
     context: &str,
     request_url: &str,
     failure_stage: &'static str,
@@ -155,12 +158,13 @@ pub(crate) fn map_curl_error(
     reference_image_count: Option<usize>,
     request_params: Option<&Value>,
 ) -> PlatformImageError {
+    let provider_label = provider.as_str();
     let is_timeout = error.is_timeout();
     let is_connect = error.is_connect() || error.is_transient_transport();
     let source = error.to_string();
     let message = format!("{context}：{source}");
     let audit = build_failure_audit(
-        VECTOR_ENGINE_PROVIDER,
+        provider_label,
         request_url,
         context,
         failure_stage,
@@ -177,7 +181,7 @@ pub(crate) fn map_curl_error(
         image_model,
     );
     tracing::warn!(
-        provider = VECTOR_ENGINE_PROVIDER,
+        provider = provider_label,
         endpoint = %request_url,
         failure_stage,
         timeout = is_timeout,
@@ -200,7 +204,7 @@ pub(crate) fn map_curl_error(
     );
 
     PlatformImageError::Request {
-        provider: VECTOR_ENGINE_PROVIDER,
+        provider: provider_label,
         message,
         endpoint: Some(request_url.to_string()),
         timeout: is_timeout,