container: lib_hledger: add TODO re: hledger-flow v0.16.3+

container/src/finance/lib/internal/lib_hledger.bash

@@ -142,6 +142,10 @@ function lib_hledger::__hledger-import()
 {
   lib_hledger::__parse_hledger-import "$@"
 
+  # TODO: v0.16.3+: add `--new-files-only` once hledger-flow adds *change* time support.
+  # Currently, only *modify* time is supported. This is a problem after `git --reset`ing
+  # or checking out a source file and then re-downloading the source file; as doing this
+  # will only update the change time (leaving the source file "unmodified"/not imported).
   time hledger-flow import \
     "$(dirname $global_child_profile_journal)" \
     --start-year "$global_arg_year"