[BUG] Size limit of a given field is 32KB

[A-Gray-Cat]

What is the bug?
* When creating a MV/CI, I encountered the following error:
* A potential workaround: https://discuss.elastic.co/t/error-document-contains-at-least-one-immense-term-in-field/66486
* {"Message":"Fail to run query. Cause: failure in bulk execution:\n[316]: index [flint_securitylake_default_last_7day_ct_yue_mv], id [8no9yJEBJ8hCpANQgrau], message [OpenSearchException[OpenSearch exception [type=illegal_argument_exception, reason=Document contains at least one immense term in field=\"api.response.data\" (whose UTF8 encoding is longer than the max length 32766), all of which were skipped. Please correct the analyzer to not produce such terms. The prefix of the first immense term is: '[123, 34, 82, 101, 99, 111, 114, 100, 115, 34, 58, 91, 123, 34, 70, 105, 110, 100, 105, 110, 103, 73, 100, 101, 110, 116, 105, 102, 105, 101]...', original message: bytes can be at most 32766 in length; got 39932]]; nested: OpenSearchException[OpenSearch exception [type=max_bytes_length_exceeded_exception, reason=max_bytes_length_exceeded_exception: bytes can be at most 32766 in length; got 39932]];]"}

How can one reproduce the bug?
Steps to reproduce the behavior:

1. Create a MV against a table that has a single field which can go beyond 32KB max limit.

What is the expected behavior?
A clear and concise description of what you expected to happen.

What is your host/environment?

• OS: [e.g. iOS]
• Version 2.13
• Plugins

Do you have any screenshots?
If applicable, add screenshots to help explain your problem.

Do you have any additional context?
Add any other context about the problem.

[dai-chen]

There seems an ignore_above field option to avoid this. But currently Flint doesn't set it automatically or provide a way for users.