Add TODO mentioning Boost version

[atomicules (via pkgsrc-wip) <commit-notify%pkgsrc.org@localhost>]

Module Name:	pkgsrc-wip
Committed By:	atomicules <base%atomicules.co.uk@localhost>
Pushed By:	atomicules
Date:		Wed Dec 10 15:29:29 2025 +0000
Changeset:	92899b114bd54d6f19d6a966b8e966934a05a8a6

Added Files:
	ledger/TODO

Log Message:
Add TODO mentioning Boost version

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diffstat:
 ledger/TODO | 2 ++
 1 file changed, 2 insertions(+)

diffs:
diff --git a/ledger/TODO b/ledger/TODO
new file mode 100644
index 0000000000..304bda9de7
--- /dev/null
+++ b/ledger/TODO
@@ -0,0 +1,2 @@
+1. This built and ran fine on NetBSD 10.1 amd64 with Boost 1.87 from Pkgsrc. Do
+   we need to state a minimum Boost version?