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/propers/common/hymn-iam-lucis-orto-sidere.yml

@@ -0,0 +1,49 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), 2026-08-25
+# run. The final (5th) doxology stanza is stored separately — see
+# hymn-doxology-per-annum.yml and hours/hymn-doxology.ts — since it varies
+# by season, unlike these first four.
+id: hymn-iam-lucis-orto-sidere
+text:
+  la: |
+    Jam lucis orto sídere,
+    Deum precémur súpplices,
+    Ut in diúrnis áctibus
+    Nos servet a nocéntibus.
+
+    Linguam refrénans témperet,
+    Ne litis horror ínsonet:
+    Visum fovéndo cóntegat,
+    Ne vanitátes háuriat.
+
+    Sint pura cordis íntima,
+    Absístat et vecórdia;
+    Carnis terat supérbiam
+    Potus cibíque párcitas.
+
+    Ut, cum dies abscésserit,
+    Noctémque sors redúxerit,
+    Mundi per abstinéntiam
+    Ipsi canámus glóriam.
+  en: |
+    Now in the sun's new dawning ray,
+    Lowly of heart, our God we pray
+    That he from harm may keep us free
+    In all the deeds this day shall see.
+
+    May fear of him our tongues restrain,
+    Lest strife unguarded speech should stain:
+    His favouring care our guardian be,
+    Lest our eyes feed on vanity.
+
+    May every heart be pure from sin
+    And folly find no place therein:
+    Scant need of food, excess denied,
+    Wear down in us the body's pride.
+
+    That when the light of day is gone,
+    And night in course shall follow on.
+    We, free from cares the world affords,
+    May chant the praise that is our Lord's.
+status:
+  la: verified
+  en: verified