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处理链 startParseDocuments 触发 RAGFlow 解析后置 parsing/processing 即返回，RAGFlow 解析+embedding+索引为异步；此前无 worker 轮询其完成态(pollDocumentStatuses 仅 IT 手动调用)，文档永久卡 parsing 无法 searchable。 新增 MuseKnowledgeParseStatusPollWorker(@Scheduled，默认关闭开关 muse.knowledge.parse-poll-worker.enabled): - 跨租户捞 parsing 任务(selectParsingForPoll + executeIgnore)，逐个切回任务租户轮询 RAGFlow 文档状态 - museStatus=searchable(RAGFlow run=done)→ markRagflowParseCompleted(task completed + version processingStatus=searchable → 文档 isSearchable=true，可进检索) - failed → markRagflowParseFailed；processing → markRagflowParsePolling 刷新进度并保持 parsing - RAGFlow 临时不可达/轮询异常一律保持 parsing 等下轮重试，绝不误判失败 ProcessingTaskService 补 markRagflowParseCompleted/markRagflowParsePolling；Mapper 补 selectParsingForPoll。 验证: worker 接线 7 + 回归(DocumentService 17 + Facade 3 + ScanService 9 + P-B RetrievalApiImpl 11) 全绿。端到端启用开关后真验。 Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>