fix: 修复知识库失败批次继续与重分块

- 统一继续和重试逻辑，恢复全部失败明细

- 向量化失败时废弃旧快照并重新分块

- 增加 BGE-M3 分块硬上限与索引写入结果校验

easyflow-ui-admin/app/src/views/ai/documentCollection/DocumentImportBatchStatus.vue

@@ -15,7 +15,6 @@ interface BatchStatus {
   pendingCount: number;
   processingCount: number;
   progressPercent: number;
-  retryableFailedCount?: number;
   skippedCount: number;
   status:
     | 'CANCELLED'
@@ -53,8 +52,7 @@ const canContinue = computed(
     props.manageable &&
     (batch.value?.status === 'INTERRUPTED' ||
       batch.value?.status === 'PARTIAL_SUCCEEDED') &&
-    (Number(batch.value?.retryableFailedCount || 0) > 0 ||
-      Number(batch.value?.failedCount || 0) > 0),
+    Number(batch.value?.failedCount || 0) > 0,
 );
 
 const processedCount = computed(