feat: retry async image tasks

apps/api/generation.py

@@ -246,6 +246,7 @@ def execute_precharged_generation(
     precharged: PrechargedGeneration,
     *,
     image_url_builder: ImageUrlBuilder | None = None,
+    refund_on_failure: bool = True,
 ) -> GenerationResult:
     prepared = precharged.prepared
     try:
@@ -259,22 +260,24 @@ def execute_precharged_generation(
                 image_url_builder=image_url_builder,
             )
     except AiCapabilityError as exc:
-        refund_call_points(
-            precharged.call_record,
-            error_message=str(exc),
-            reason=f"Provider rejected the {prepared.operation_type} request.",
-        )
+        if refund_on_failure:
+            refund_call_points(
+                precharged.call_record,
+                error_message=str(exc),
+                reason=f"Provider rejected the {prepared.operation_type} request.",
+            )
         raise ApiRequestError(
             "bad_request",
             "请求参数不支持当前模型",
             status.HTTP_400_BAD_REQUEST,
         ) from exc
     except Exception as exc:
-        refund_call_points(
-            precharged.call_record,
-            error_message=str(exc),
-            reason=f"Upstream {prepared.operation_type} generation failed.",
-        )
+        if refund_on_failure:
+            refund_call_points(
+                precharged.call_record,
+                error_message=str(exc),
+                reason=f"Upstream {prepared.operation_type} generation failed.",
+            )
         raise upstream_error(exc) from exc
 
     return result