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` only if hledger-flow adds support for
+  # tracking changes to rules and preprocess files. The tracking *must* apply to
+  # all repo files and any/all custom files. Currently, only *modified* time of
+  # source files compared to *modified* time of target files are tracked.
   time hledger-flow import \
     "$(dirname $global_child_profile_journal)" \
     --start-year "$global_arg_year"