Author missing Matins Gospel pericopes across nocturn-readings store

~110 of 355 nocturn-readings files had a patristic homily with no
paired Gospel-pericope text -- the homily discussing a Gospel that was
never itself transcribed into the file. Closed in two waves (the first
pass's source-string regex missed many real cases where the citation
lived only in a header comment or wasn't named at all), each entry
sourced from divinum-officium-reference's own Missale files (following
Sancti/Commune redirects where a feast reuses another's Gospel) and
verified per file rather than assumed -- several candidates turned out
to be genuine Nocturn 2 content or Common-of-saints cross-references
with no proper Gospel of their own, correctly left untouched.

Includes both live-reported gaps: St. Joseph of Cupertino's own Bk. II
Homily 38 (Matt 22:1-14) and the Vigil of St. Matthew's Ambrose homily
(Luke 5:27-32).

TODO.md logs the closed item plus a new, distinct follow-up: a handful
of files with no Nocturn 3 content authored at all (not just an
unpaired Gospel), found along the way.

npm test (2029 passed) and tsc --noEmit both pass.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MKC2QQGLYo2UTiDjDyWEkW

src/data/propers/nocturn-readings/ss-cletus-and-marcellinus.yml

@@ -14,6 +14,18 @@
 # distinct martyr) kept split; Lectio6 (St. Ambrose's sermon on the
 # Easter-season martyrs generally) is its own distinct source, kept
 # separate too. No responsory given in the source.
+#
+# Checked 2026-09-05 for a Gospel pairing: all three readings here are
+# Nocturn 2 (Lectio4-6). St. Ambrose's Sermon 22 is a generic
+# post-Paschaltide "rejoice with the Martyrs" homily reused verbatim
+# for several other martyr-Popes (see ss-soter-and-caius.yml), not tied
+# to any Gospel pericope -- no isGospel pairing applies. Note for a
+# future pass: 04-26.txt's own [Rule] ("vide C3b") inherits a genuine
+# Nocturn 3 wholesale from the Common of Popes (C3b -> C4b ->
+# missa/Latin/Commune/Coronatio.txt: Matt 16:13-19, "Tu es Petrus")
+# that is not authored anywhere in this store at all -- a real content
+# gap, but a new reading pair rather than a missing Gospel citation on
+# an existing homily, so out of scope for this pass.
 id: ss-cletus-and-marcellinus
 readings:
   - nocturn: 2