Was scattered across code comments and session summaries with no
single place to check what's actually left open -- consolidated here,
with concrete lists (which duplex-majus+ saints still need a Lauds
psalmody override, which already-authored Benedictus antiphons are
unverified against Monastic 1617 vs. the Roman rite they may have
actually been sourced from) rather than vague pointers.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
