bug: numeric DateTime64 inserts are misparsed on ClickHouse >= 26.8, multiplying every timestamp by 1000

这是 ClickHouse 26.8+ 与 Langfuse 自托管部署的兼容性问题,不是 Langfuse 逻辑 Bug。ClickHouse 26.8 将 input_format_read_datetime_number_as_raw_value 的默认值从 1 改为 0 ,导致 Worker
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