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/prime-chapter-responsory-per-annum.yml

@@ -0,0 +1,29 @@
+# Verified against Divinum Officium (Latin/English "Prima Special.txt").
+# This is the Roman/secular breviary's short responsory after the chapter —
+# Monastic Prime doesn't actually have one (see prime-versicle.yml's note),
+# but it's added here by deliberate choice. "Per annum" (ordinary-time) is
+# the default verse — Pentecost's own seasonal variant happens to use the
+# same verse, since Pentecost is what the ordinary-time form is drawn from.
+#
+# Structure (verified against the real engine): R.br, then a full repeat of
+# it, then the verse, then the short response, then Gloria Patri, then a
+# final full repeat — the standard short-responsory shape.
+id: prime-chapter-responsory-per-annum
+text:
+  la: |
+    R.br. Christe, Fili Dei vivi, * Miserére nobis.
+    R. Christe, Fili Dei vivi, * Miserére nobis.
+    V. Qui sedes ad déxteram Patris.
+    R. Miserére nobis.
+    V. Glória Patri, et Fílio, * et Spirítui Sancto.
+    R. Christe, Fili Dei vivi, * Miserére nobis.
+  en: |
+    R.br. Christ, Son of the living God, * have mercy on us.
+    R. Christ, Son of the living God, * have mercy on us.
+    V. Thou, who sittest at the right hand of the Father.
+    R. Have mercy on us.
+    V. Glory be to the Father, and to the Son, * and to the Holy Ghost.
+    R. Christ, Son of the living God, * have mercy on us.
+status:
+  la: verified
+  en: verified