Add August Matins readings for pre-1955 sanctoral saints

The Finding of St. Stephen, St. Donatus, St. Louis, St. Zephyrinus, and
Ss. Felix and Adauctus.

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

src/data/propers/nocturn-readings/ss-felix-and-adauctus.yml

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+# Matins Nocturn 2 reading for Ss. Felix and Adauctus, Martyrs (Aug 30)
+# — pre-1955-but-post-1617. Plain Sancti/08-30.txt is a different, later
+# saint (St. Rose of Lima, canonized 1671) who displaced Felix and
+# Adauctus on the general calendar's own Aug 30 slot; their content
+# survives at the suffixed sibling file (see memory
+# vu-matins-pre1955-saints's "critical wrinkle").
+# web/www/horas/Latin/Sancti/08-30o.txt, English/Sancti/08-30o.txt.
+# Single lesson (simplex-feast Lectio93), no responsory in the source.
+# English source has a stray-character artifact ("Him-who-was-added x
+# that is") — transcribed here with the stray "x" dropped.
+id: ss-felix-and-adauctus
+readings:
+  - nocturn: 2
+    isGospel: false
+    text:
+      la: >-
+        Felix, Diocletiano et Maximiano imperatoribus, propter susceptam Christi religionem
+        comprehensus, in Serapidis templum adductus est. Cui sacrificare cum juberetur, os simulacri
+        conspuit. Quo facto, statim serea statua corruit. Quod cum iterum ac tertio in sede Mercurii
+        Dianæque factum esset, impietatis et magicæ artis accusatus, equuleo torquetur. Mox ad
+        secundum ab Urbe lapidem via Ostiensi ducitur, ut securi feriretur. Cui inter viam oblatus
+        quidam Christianus, cum Felicem agnoscens ad martyrium duci videret, Ego quoque, clara voce
+        inquit, eadem, qua iste, lege vivo; ego eumdem Jesum Christum colo. Itaque Felicem osculatus,
+        cum eo securi percutitur, tertio Kalendas Septembris. Cujus nomen cum ignotum esset
+        Christianis, is Adaucti nomine nobilitatus est, quod sancto Martyri Felici adauctus sit ad
+        coronam.
+      en: >-
+        Felix was arrested in the reign of the Emperors Diocletian and Maximian, on the charge of
+        having embraced the Christian Faith, and was brought to the temple of Serapis. When he was
+        ordered to offer sacrifice, he spat in the face of the brazen idol, which thereupon fell
+        down. When this happened a second and third time in the temples of Mercury and Diana, he was
+        accused of impiety and magic, and tortured upon the rack. It was not long, however, before he
+        was led out to the second mile-stone upon the road to Ostia, to be smitten with the axe. As
+        they were on the way thither, they chanced to meet a certain Christian, who, when he knew
+        that Felix was going to finish his testimony, said aloud, I live by the same law as he doth;
+        I worship the same Christ Jesus. And therewith he kissed Felix, and they were beheaded
+        together, upon the 30th day of August. What the name of the second person was the Christians
+        never knew, and he is therefore honoured under the title of Him-who-was-added, that is,
+        added to the company of the Holy Martyr Felix in winning of the crown.
+    status: { la: verified, en: verified }