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/regula/04-01.yml

@@ -0,0 +1,13 @@
+# Verified against Divinum Officium (Latin Regula, English translation).
+canonicalDate: "04-01"
+label:
+  la: "Régula Sancti Patri Nostri Benedícti. Caput 50: De frátribus qui longe ab oratório labórant aut in via sunt"
+  en: "The Rule of our Holy Father Benedict. Chapter 50: Concerning Brethren Who Are Working At a Distance From the Oratory, Or Are On the Road"
+text:
+  la: |
+    Fratres qui omníno longe sunt in labóre et non possunt occúrrere hora conpeténti ad oratórium - et abbas hoc perpéndet quia ita est - agant ibídem opus Dei, ubi operántur, cum tremóre divíno flecténtes génua. Simíliter qui in itínere dirécti sunt, non eos prætéreant Horæ constitútæ, sed, ut possunt, agant sibi et servitútis pensum non néglegant réddere.
+  en: |
+    Let brethren who are at work quite a long way off or are on the road and cannot get to the oratory at the appointed time, the abbot having decided that such is the case, say their office there where they are at work, kneeling with all reverence. Similarly let not those who have been sent on a journey neglect an appointed hour but keep it, by themselves, and not fail to render the full measure of their holy servitude as they are able.
+status:
+  la: verified
+  en: verified