limit of 65535 characters for meta_value of build_meta with mysql #94

In my instance, the value of phpunit-data is silently cut to 65535 characters. This results in invalid json, so no results for phpunit are shown on the information tab.

The value for phpunit-data is stored in build_meta.meta_value. This field has type text.
The size limit for text is 65535: https://dev.mysql.com/doc/refman/5.7/en/string-type-overview.html#idm140523574444128

How should this be fixed?

• Store less data in this column for phpunit-data?
• Use another column type for mysql (MEDIUMTEXT, ...)? Is there anything undesired when doing this?
• Indicate that not all could be saved and only show part of the result?
• Recommend user to not run this many tests?