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/05-31.yml

@@ -0,0 +1,34 @@
+# Verified against Divinum Officium (Latin Martyrologium, English translation).
+monthDay: "05-31"
+text:
+  la: |
+    Festum beátæ Maríæ Vírginis Regínæ.
+
+    Romæ sanctæ Petroníllæ Vírginis, fíliæ beáti Petri Apóstoli, quæ, conjúgium nóbilis viri Flacci spernens, et, accéptis triduánis ad deliberándum indúciis, ínterim jejúniis et oratiónibus vacans, tértia die, mox ut Christi Sacraméntum accépit, emísit spíritum.
+
+    Aquiléjæ sanctórum Mártyrum fratrum Cántii, Cantiáni et Cantianíllæ, qui, cum essent ex illústri Aniciórum progénie, sub Diocletiáno et Maximiáno Imperatóribus, ob Christiánæ fídei constántiam, una cum pædagógo suo Proto, cápite plexi sunt.
+
+    Túrribus, in Sardínia, sancti Crescentiáni Mártyris.
+
+    Apud Comános, in Ponto, sancti Hérmiæ mílitis, qui, sub Antoníno Imperatóre, de innúmeris et sævíssimis torméntis divína ope liberátus, carníficem convértit ad Christum, et ejúsdem martýrii corónæ partícipem fecit; quam tamen ipse primus, gládio obtruncátus, accépit.
+
+    Verónæ sancti Lupicíni Epíscopi.
+
+    Romæ sancti Paschásii, Diáconi et Confessóris, cujus méminit beátus Gregórius Papa.
+  en: |
+    At Brescia, the holy Virgin Angela Merici, Foundress of the religious Sisters of St. Ursula, to have for their principal work the leading of young maidens in the ways of the Lord. Of her mention is made upon the 27th day of January.
+
+    At Rome, the holy Virgin Petronilla, daughter of the blessed Apostle Peter. She looked down upon an offer of marriage from the noble Flaccus, and took three days to consider the matter, the which time she spent in fasting and prayer, and upon the third day, immediately after receiving the Sacrament of Christ, she gave up the ghost.
+
+    At Aquileia, the holy brothers Cantius and Cantian, and their sister Cantianilla, all martyrs of the noble family of the Anicii, who, along with their schoolmaster Protus, were beheaded under the Emperors reigned A.D. 269-274. Diocletian and Maximian on account of their firmness in the Christian faith.
+
+    At Torre, in Sardinia, [in the persecution under the Emperor Hadrian,] the holy martyr Crescentian.
+
+    At Comana, in Pontus, the holy soldier Hermias. He was delivered by God's help from countless and savage tortures, under the Emperor Antoninus. He converted his executioner to Christ, and made him a sharer in the crown of his own martyrdom, but he himself was the first to grasp it, by being beheaded.
+
+    At Verona, [in the sixth century,] the holy Lupicinus, Bishop [of that see.]
+
+    At Rome, the holy Deacon Paschasius, a Confessor of whom doth make mention the blessed Pope Gregory [the Great.]
+status:
+  la: verified
+  en: verified