Update RETL Query Length Limit

[Lfdelossantos]

Hi, I am on the RETL team and we noticed that in our public docs we are using an erroneous value for the query length. For the query column in our MySQL DB we use MYSQL TEXT which has a character limit of 65,535. When a customer/user saves anything longer than that it auto truncates to that limit, which will lead to the query failing.

Confirmed that by writing a model query at 131,071 (right below our listed limit), and when I queried the DB it was truncated

mysql> select LENGTH(query) from reverse_etl_models where id = '5PuvDCsS6FdJXP2iJH3SiY';
+---------------+
| LENGTH(query) |
+---------------+
|         65535 |
+---------------+

Merge timing

Merge whenever it is approved please :)

[github-actions]

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