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/02-17.yml

@@ -0,0 +1,13 @@
+# Verified against Divinum Officium (Latin Regula, English translation).
+canonicalDate: "02-17"
+label:
+  la: "Régula Sancti Patri Nostri Benedícti. Caput 14: In natalíciis sanctórum quáliter agántur vigíliæ"
+  en: "The Rule of our Holy Father Benedict. Chapter 14: How Night Office Is to Be Said On the Feasts of Saints"
+text:
+  la: |
+    In sanctórum vero festivitátibus vel ómnibus sollemnitátibus sicut díximus domínico die agéndum, ita agátur, excépto quod psalmi aut antefánæ vel lectiónes ad ipsum diem pertinéntes dicántur; modus autem suprascríptus teneátur.
+  en: |
+    On the festivals of saints and on other solemn days let office be said in such wise as we have explained it is to be said on the Lord’s day, except that there are to be said the psalms, antiphons and lections proper to such day. Their number, however, shall remain as we have appointed above.
+status:
+  la: verified
+  en: verified