fix: 修正模型超时与结果未知重放

core/backend/apps/ai/services.py

@@ -18,7 +18,12 @@ from django.db import transaction
 from django.utils import timezone
 
 from apps.ai.models import AITask, ModelConfig
-from apps.ai.generation_errors import TASK_OPERATIONS, classify_generation_error, public_error_for_task
+from apps.ai.generation_errors import (
+    TASK_OPERATIONS,
+    ProviderOutcomeUnknownError,
+    classify_generation_error,
+    public_error_for_task,
+)
 from apps.ai.model_routing import ModelRequirements, capability_metadata, model_allows_fallback
 from apps.ai.providers import (
     OpenAICompatibleProvider,
@@ -200,6 +205,7 @@ def execute_routed_image_request(
         except Exception as exc:
             # Provider 已返回并可能产生上游费用；响应解析失败仍需审计本次真实尝试成本。
             candidate_quote = quote_flat(actual_model, team=task.team)
+            exc.outcome_unknown = True
             exc.attempt_metadata = AttemptMetadata(
                 usage=actual_response.get("usage") if isinstance(actual_response, dict) else {},
                 platform_cost=candidate_quote.base_cost_yuan,
@@ -853,7 +859,7 @@ def execute_routed_audio_request(
     )
 
 
-class VideoSubmissionStateUnknown(RuntimeError):
+class VideoSubmissionStateUnknown(ProviderOutcomeUnknownError):
     """视频提交可能已到达供应商但未拿到可靠任务 ID；禁止自动重提。"""
 
 
@@ -3326,26 +3332,6 @@ def poll_video_segment(*, video_segment: VideoSegment, user) -> VideoSegmentVers
     from apps.ai.routing_policy import load_model_routing_policy
 
     video_policy = load_model_routing_policy().video
-    if ai_task.submitted_at and (timezone.now() - ai_task.submitted_at).total_seconds() >= video_policy.generation_timeout:
-        timeout_message = "视频生成超过配置的等待总时限"
-        with transaction.atomic():
-            locked_task = AITask.objects.select_for_update().get(id=ai_task.id)
-            if locked_task.status in (AITask.Status.SUCCEEDED, AITask.Status.FAILED, AITask.Status.CANCELLED):
-                return video_segment.versions.filter(task=locked_task).order_by("-created_at").first()
-            locked_task.status = AITask.Status.FAILED
-            locked_task.error_message = timeout_message
-            locked_task.completed_at = timezone.now()
-            locked_task.save(update_fields=["status", "error_message", "completed_at", "updated_at"])
-            release_credit(reservation=locked_task.credit_reservation, reason=timeout_message)
-            video_segment.status = VideoSegment.Status.FAILED
-            video_segment.error_message = classify_generation_error(
-                TimeoutError(timeout_message),
-                operation="video_generate",
-                reference_id=str(locked_task.id),
-            ).fallback_message
-            video_segment.save(update_fields=["status", "error_message", "updated_at"])
-        return None
-
     provider = get_video_provider(actual_model)
     response = provider.poll_video_task(
         endpoint=actual_model.endpoint,