propers: Benedictus antiphons for September's sanctoral entries (5/5)

4 authored fresh (Matthew, Ss. Cyprian and Justina, Ss. Cosmas and
Damian, Jerome), 1 corrected (the Nativity of the BVM -- confirmed
sourced from the Roman rite's raw [Ant 1] rather than a real Monastic
1617 rendering, same pattern as every month so far).

Matthew needed the same register fix as Matthias/Barnabas/James the
Greater/Bartholomew (Matt 19:27ff, same verse): the source's own
English existed but read jarringly modern next to everything else,
reworded to match and marked draft.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/data/propers/common/st-matthew-antiphon.yml

@@ -0,0 +1,15 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), Lauds
+# live query, St. Matthew's own day (2026-09-21) -- the Benedictus
+# antiphon (Matt 19:27ff, same verse as St. Matthias/St. Barnabas/
+# St. James the Greater/St. Bartholomew's own). The source's own English
+# existed but was jarringly modern next to every other antiphon's archaic
+# register -- reworded to match (the underlying verse's standard
+# Douay-Rheims wording, same fix as those four), marked draft rather
+# than a straight source transcription.
+id: st-matthew-antiphon
+text:
+  la: "Vos qui reliquístis ómnia, et secúti estis me, céntuplum accipiétis, et vitam ætérnam possidébitis."
+  en: "Ye who have left all things, and have followed me, shall receive an hundredfold, and shall possess life everlasting."
+status:
+  la: verified
+  en: draft