yihao.dai 1b5554c8cb
enhance: Support $meta key for json import (#32013)
During JSON import:
1. Allow the specification of the $meta key
2. Prohibit duplicated keys within the $meta field, for instance,
`{"id": 1, "vector": [], "x": 6, "$meta": {"x": 8}}`

issue: https://github.com/milvus-io/milvus/issues/31835

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Signed-off-by: bigsheeper <yihao.dai@zilliz.com>
2024-04-10 17:27:17 +08:00
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