* Export query itself together with queryId in stat_statement metrics
* The feature must be enabled via flag.
* Limit length of selected query.
The query is not added to every metrics, but instead of new metric stat_statement_query_id is introduced that contains mapping between queryId and query.
Fixes: #813
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Signed-off-by: Jakub Štiller <stiller@2n.cz>
Signed-off-by: Jakub Štiller <jakstiller@atlas.cz>