fix(storage): 补齐嵌套结果二进制转存

生产真实 Gemini 图片任务可能在标准 data 之外保留嵌套 Base64，导致最终持久化关口拒绝任务成功。\n\n在所有生成结果返回前统一执行递归转存，并对仍未被常规媒体转换识别的二进制回退到本地结果物化，确保 PostgreSQL 不接收原始二进制。\n\n验证：go test ./... -count=1；go vet ./...；使用生产 Gemini Flash Image 平台配置完成本地真实图片编辑请求，文件哈希一致且持久化结果无内联二进制。

apps/api/internal/runner/upload.go

@@ -98,8 +98,7 @@ func (s *Service) uploadGeneratedAssets(ctx context.Context, taskID string, task
 		return next, nil
 	}
 	if len(data) == 0 && !rawNeedsUpload {
-		redactGeneratedResultRawData(result)
-		return result, nil
+		return s.finalizeGeneratedAssets(ctx, taskID, taskKind, result, policy, nil, false, 0)
 	}
 	// Topaz download URLs are short-lived. Persist them before the task can be
 	// marked succeeded even when the global policy normally keeps URL media.
@@ -128,15 +127,16 @@ func (s *Service) uploadGeneratedAssets(ctx context.Context, taskID string, task
 	}
 	rawNeedsUpload = rawNeedsUpload && policy.UploadInlineMedia
 	if !needsUpload && !changed && !rawNeedsUpload {
-		redactGeneratedResultRawData(result)
-		return result, nil
+		return s.finalizeGeneratedAssets(ctx, taskID, taskKind, result, policy, nil, false, 0)
 	}
 	var channels []store.FileStorageChannel
+	channelsLoaded := false
 	if needsUpload || rawNeedsUpload {
 		channels, err = s.activeFileStorageChannels(ctx, store.FileStorageSceneImageResult)
 		if err != nil {
 			return nil, &clients.ClientError{Code: "upload_config_failed", Message: err.Error(), Retryable: true}
 		}
+		channelsLoaded = true
 	}
 	next := map[string]any{}
 	for key, value := range result {
@@ -217,8 +217,59 @@ func (s *Service) uploadGeneratedAssets(ctx context.Context, taskID string, task
 			next["raw"] = raw
 		}
 	}
-	redactGeneratedResultRawData(next)
-	return next, nil
+	return s.finalizeGeneratedAssets(ctx, taskID, taskKind, next, policy, channels, channelsLoaded, len(nextData))
+}
+
+func (s *Service) finalizeGeneratedAssets(
+	ctx context.Context,
+	taskID string,
+	taskKind string,
+	result map[string]any,
+	policy generatedAssetUploadPolicy,
+	channels []store.FileStorageChannel,
+	channelsLoaded bool,
+	startIndex int,
+) (map[string]any, error) {
+	redactGeneratedResultRawData(result)
+	if !TaskResultHasInlineBinary(result) {
+		return result, nil
+	}
+	next := result
+	if policy.UploadInlineMedia {
+		var err error
+		if !channelsLoaded {
+			channels, err = s.activeFileStorageChannels(ctx, store.FileStorageSceneImageResult)
+			if err != nil {
+				return nil, &clients.ClientError{Code: "upload_config_failed", Message: err.Error(), Retryable: true}
+			}
+		}
+		index := startIndex
+		uploaded, changed, err := s.uploadGeneratedRawMediaValue(ctx, taskID, taskKind, next, "", nil, policy, channels, &index)
+		if err != nil {
+			return nil, err
+		}
+		if changed {
+			mapped, ok := uploaded.(map[string]any)
+			if !ok {
+				return nil, &clients.ClientError{
+					Code:       "result_binary_not_materialized",
+					Message:    "generated result is not a JSON object",
+					StatusCode: 500,
+					Retryable:  false,
+				}
+			}
+			next = mapped
+		}
+	}
+	if !TaskResultHasInlineBinary(next) {
+		return next, nil
+	}
+	persistent, _, err := s.materializeLocalBinaryResult(ctx, taskID, next)
+	if err != nil {
+		return nil, err
+	}
+	redactGeneratedResultRawData(persistent)
+	return persistent, nil
 }
 
 func generatedRawValueHasInlineMedia(value any, key string, siblings map[string]any) bool {