Clarify old WAL files cannot be removed until they are summarized

When Who What
2024-12-18 12:18:45 John Naylor (john.naylor) Closed in commitfest 2025-01 with status: Committed
2024-12-18 12:18:45 John Naylor (john.naylor) Changed committer to masaofujii
2024-12-11 00:19:00 Michael Paquier (michael-kun) Closed in commitfest 2024-11 with status: Moved to next CF
2024-12-11 00:18:58 Michael Paquier (michael-kun) New status: Ready for Committer
2024-10-19 16:24:17 Fujii Masao (masaofujii) Changed authors to Fujii Masao (masaofujii)
2024-10-19 16:23:59 Fujii Masao (masaofujii) Attached mail thread fd0eb0a5-f43b-4e06-b450-cbca011b6cff@oss.nttdata.com
2024-10-19 16:23:59 Fujii Masao (masaofujii) Created patch record