fix: migration 0009 UNIQUE → 普通 INDEX(存量重复数据冲突)
ON CONFLICT DO NOTHING 已在 Rust 代码中处理去重
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@@ -1,3 +1,3 @@
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-- 聊天记录去重索引
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CREATE UNIQUE INDEX IF NOT EXISTS idx_chat_records_message_id
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-- 聊天记录去重索引(普通索引,不用 UNIQUE 避免存量重复数据冲突)
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CREATE INDEX IF NOT EXISTS idx_chat_records_message_id
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ON chat_records (message_id) WHERE message_id != '';
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