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/psalter-distribution.yml

@@ -1,16 +1,38 @@
-# PLACEHOLDER distribution: real Benedictine Prime actually distributes
-# multiple fixed psalms plus a rotating section of Ps 118 across the week,
-# and the user has modifications in mind on top of that — none of that is
-# designed yet. This file exists only to prove the (hourId, weekday) -> psalm
-# numbers lookup works end to end, using the one psalm we have sample data
-# for. Expect this file to be rewritten entirely once real content-authoring
-# starts (see plan: "psalter modifications are edits to this data, not
-# engine changes").
+# Verified against Divinum Officium (Monastic Tridentinum 1617). Confirmed by
+# running the real engine (not just reading its data files) that this table
+# is used unconditionally by weekday, regardless of feast rank — Monastic
+# Prime has no "Festis" override the way secular/Roman Prime does, so a
+# Duplex-rank feast still gets the plain weekday psalms. Antiphons aren't
+# modeled yet (each day has its own, e.g. Monday's "Servíte Dómino in
+# timóre") — that's propers content-authoring, not a distribution-table
+# concern.
 prime:
-  sunday: [1]
-  monday: [1]
-  tuesday: [1]
-  wednesday: [1]
-  thursday: [1]
-  friday: [1]
-  saturday: [1]
+  sunday:
+    - { number: 118, verses: "1-8" }
+    - { number: 118, verses: "9-16" }
+    - { number: 118, verses: "17-24" }
+    - { number: 118, verses: "25-32" }
+  monday:
+    - { number: 1 }
+    - { number: 2 }
+    - { number: 6 }
+  tuesday:
+    - { number: 7 }
+    - { number: 8 }
+    - { number: 9, verses: "2-19" }
+  wednesday:
+    - { number: 9, verses: "20-39" }
+    - { number: 10 }
+    - { number: 11 }
+  thursday:
+    - { number: 12 }
+    - { number: 13 }
+    - { number: 14 }
+  friday:
+    - { number: 15 }
+    - { number: 16 }
+    - { number: 17, verses: "2-25" }
+  saturday:
+    - { number: 17, verses: "26-51" }
+    - { number: 18 }
+    - { number: 19 }