♻️(backends) remove ClickHouse JSON column (#482) #493
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Purpose
Initial implementation of the ClickHouse backend used the experimental JSON column type, with the string of the JSON as a backup. The JSON type has never graduated out of experimental status and has some serious issues that make it undesirable to support.
This commit removes all references to the column in favor of using the JSON ClickHouse functions, which are generally faster and better supported.