Before this fix, the use of PG template patterns containing ":" or the
use of "?" in comments in the SQL will result in an error being raised
because `DB.param_encoder.encode` calls ActiveRecord's `sanitize_sql_array` which is
meant for SQL fragments and not an entire SQL string.
Instead we change data-explorer to use `MiniSql::InlineParamEncoder`
instead which takes into account of template patterns and does not trip
on `?` which is a special param encoding character used by ActiveRecord.
David Taylor
Alan Guo Xiang Tan