Add slow query logger based on Doobie

[imsdu]

Example of log:

2024-05-22 09:48:14 WARN  c.e.b.n.d.sourcing.QueryLogHandler - [StreamingPool] Slow Statement Execution:

 ((SELECT 'newState', type, id, org, project, value, instant, ordering, rev
  FROM public.scoped_states
  WHERE org = ? and project = ?  AND ordering > ?  AND tag = ? 
  ORDER BY ordering
  LIMIT ?)
  UNION ALL
  (SELECT 'tombstone', type, id, org, project, null, instant, ordering, -1
  FROM public.scoped_tombstones
  WHERE org = ? and project = ?  AND ordering > ?  AND tag = ?  AND (cause->>'deleted' = 'true' ) 
  ORDER BY ordering
  LIMIT ?)
  ORDER BY ordering)
  LIMIT ?

 arguments = [mbodytmoxbxk0do, n5rspxio3rlet3w, 184, latest, 30, mbodytmoxbxk0do, n5rspxio3rlet3w, 184, latest, 30, 30]
 label     = unlabeled
 elapsed = 11 ms exec + 0 ms processing (11 ms total)

So we have the arguments now to make it easier

[imsdu]

Slow query logging was the only feature we used from it so we can just get rid of it now