Cache jobs in pool manager

This change caches jobs meant for an entity in the pool manager. This
allows us to avoid querying the db as much and allows us to better determine
when we should scale down.

Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>

database/sql/sql.go

@@ -71,6 +71,7 @@ func newDBConn(dbCfg config.Database) (conn *gorm.DB, err error) {
 	if dbCfg.Debug {
 		conn = conn.Debug()
 	}
+
 	return conn, nil
 }