Abandoned games at the end of the month

(migrated from https://github.com/ornicar/lila/issues/9720)

Regarding the databases on https://database.lichess.org/, most files for different months were generated long after the months were over, which meant that abandoned games had long been removed from the server.

Starting from the recent July 2021 database however, the PGN actually contains games which were cancelled/abandoned near the end of the month.

One such example game in the July 2021 database is given below, which was played/abandoned on July 30th. Note that the corresponding link https://lichess.org/zPDH02kW is now long gone, but presumably when the static export was generated the game still existed on the server.

[Event "Rated Correspondence game"]
[Site "https://lichess.org/zPDH02kW"]
[Date "2021.07.30"]
[Round "-"]
[White "Minty0209"]
[Black "Amini_alireza"]
[Result "*"]
[UTCDate "2021.07.30"]
[UTCTime "02:18:45"]
[WhiteElo "1500"]
[BlackElo "1500"]
[WhiteTitle "WFM"]
[ECO "?"]
[Opening "?"]
[TimeControl "-"]
[Termination "Abandoned"]

*

To fix the database and exclude such games (as was also done for all months prior to July 2021), maybe one could generate the static database later, when the aborted games have been removed from the server, or the export could manually filter out these aborted games.

See also the corresponding Zulip discussion.

No repository files or tests are identified in the issue. Start by locating the export process that produced the July 2021 database, then review the linked Zulip discussion and compare the handling of abandoned games with earlier monthly exports; done means the published export excludes games abandoned near the end of a month.