Prime: real content (psalms, Martyrology, Regula) and ordo corrections

Pulls in verified content from Divinum Officium rather than placeholders:
17 psalms (2, 6, 7-19, 118, 129), 365 days of the Martyrology, and the full
121-reading Regula cycle, plus the Athanasian Creed.

Ordo corrections driven by review against the real engine output:
- Capitulum and Preces now pick a Sunday/feast vs. ferial form
  (calendar/isSundayOrFeast); ferial Preces said every ferial day by choice.
- Chapter responsory, hymn doxology, and the opening versicle's
  Alleluia/Laus tibi all vary by season via a shared resolver
  (hours/seasonal-propers.ts).
- Real Roman Kalends/Nones/Ides Latin dating (calendar/roman-date.ts,
  verified against 363/365 real Martyrology headings) plus the historical
  "bis sextus" Feb 29 handling, and the Martyrology's Luna (moon-day)
  heading (a ported Golden-Number calculation).
- Fixed responsory structure (was missing its initial full repeat),
  weekday psalm antiphons (opening as incipit-or-full by rank, full
  repeat after the psalms/Creed as its own part, "*" chant mark kept),
  scripture citations on the capitulum/lectio brevis, and V./R. markers
  switched from Unicode symbols to plain text for reliable font rendering.
- Dropped Pretiosa and the dead-commemoration psalm (129) for time;
  trimmed section headings down to the ones that are actually named
  things (Preces, Chapter Office, etc. no longer relabel connective text).

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

src/data/martyrology/04-26.yml

@@ -0,0 +1,38 @@
+# Verified against Divinum Officium (Latin Martyrologium, English translation).
+monthDay: "04-26"
+text:
+  la: |
+    Romæ natális beáti Cleti, Papæ et Mártyris; qui, secúndus post Apóstolum Petrum, rexit Ecclésiam, et martýrio in persecutióne Domitiáni coronátus est.
+
+    Sancti Marcellíni, Papæ et Mártyris, cujus dies natális octávo Kaléndas Novémbris recensétur.
+
+    Amaséæ, in Ponto, sancti Basiléi, Epíscopi et Mártyris, qui, sub Licínio Imperatóre, illústre martýrium consummávit. Ipsíus autem corpus, in mare projéctum, et ab Elpidíphoro, Angeli mónitu repértum, honorífice tumulátum fuit.
+
+    Brácari, in Lusitánia, sancti Petri Mártyris, qui fuit primus ejúsdem civitátis Epíscopus.
+
+    Viénnæ, in Gállia, sancti Claréntii, Epíscopi et Confessóris.
+
+    Verónæ sancti Lucídii Epíscopi.
+
+    In monastério Céntula, in Gállia, sancti Richárii, Presbýteri et Confessóris.
+
+    Trecis, in Gállia, sanctæ Exsuperántiæ Vírginis.
+  en: |
+    At Rome, the blessed Pope Cletus. He was the second who ruled the Church after the Apostle Peter, and was crowned with martyrdom in the persecution under the Emperor Domitian.
+
+    There also the holy martyr Pope Marcellinus, who was beheaded for Christ's faith's sake, in the persecution under the Emperor Maximian, along with Claudius, Cyrinus, and Antonine, at the time when the persecution was so great that seventeen thousand Christians were crowned with martyrdom within the space of one month.
+
+    At Amasea, in Pontus, [about the year 322,] the holy martyr Basil, Bishop of that see, who gained an illustrious martyrdom under the Emperor Licinius. His body was cast into the sea, but was found by Elpidiphorus on the warning of an angel and was honourably buried.
+
+    At Braga, in Portugal, [in the first century,] the holy martyr Peter, first Bishop of that city.
+
+    At Vienne, the holy Confessor Clarence, Bishop of that see, [about the year 620.]
+
+    At Verona, holy Lucidius, Bishop of that see.
+
+    In the monastery of Centule, [in the seventh century,] the holy Confessor, the Priest Requier.
+
+    At Troyes, the holy virgin Exuperantia, [in the year 380.]
+status:
+  la: verified
+  en: verified