Add accumulated statistics for wait event

2020-08-02 22:00:52 Daniel Gustafsson (d_gustafsson) Closed in commitfest 2020-07 with status: Returned with feedback 2020-07-01 08:41:56 Daniel Gustafsson (d_gustafsson) New status: Waiting on Author 2020-04-23 01:28:55 atsushi torikoshi (atorik) Added atorik as reviewer 2020-04-08 16:05:46 David Steele (dsteele) Changed targetversion to None 2020-04-08 15:25:11 David Steele (dsteele) Closed in commitfest 2020-03 with status: Moved to next CF 2020-02-01 11:32:07 Tomas Vondra (fuzzycz) Closed in commitfest 2020-01 with status: Moved to next CF 2020-02-01 11:32:02 Tomas Vondra (fuzzycz) New status: Needs review 2020-02-01 05:51:00 Pavel Stehule (okbobcz) New status: Waiting on Author 2020-01-15 13:17:02 Yoshikazu Imai (yimai) New status: Needs review 2020-01-12 19:11:13 Pavel Stehule (okbobcz) Posted review with messageid <157885627316.709.5238462716028054708.pgcf@coridan.postgresql.org> 2020-01-12 19:11:13 Pavel Stehule (okbobcz) New status: Waiting on Author 2020-01-12 17:24:32 Pavel Stehule (okbobcz) Added okbobcz as reviewer 2020-01-07 01:16:01 Yoshikazu Imai (yimai) New status: Needs review 2019-12-01 01:11:33 Michael Paquier (michael-kun) New status: Waiting on Author 2019-12-01 01:11:28 Michael Paquier (michael-kun) Closed in commitfest 2019-11 with status: Moved to next CF 2019-10-31 00:26:24 Yoshikazu Imai (yimai) Changed targetversion to 13 2019-10-31 00:26:24 Yoshikazu Imai (yimai) Changed authors to Yoshikazu Imai (yimai) 2019-10-31 00:25:36 Yoshikazu Imai (yimai) Attached mail thread 2022793411.102298.1532329482584.JavaMail.jboss@ep1ml402 2019-10-31 00:25:36 Yoshikazu Imai (yimai) Created patch record