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/propers/index.ts

@@ -0,0 +1,25 @@
+import type { ProperText } from './types';
+
+// Only the "common" propers store exists so far — sanctoral/temporal propers
+// (source: 'sanctoral' | 'temporal') are milestone-4 concerns and have no
+// data directory yet.
+const modules = import.meta.glob<{ default: ProperText }>('../data/propers/common/*.yml', {
+  eager: true,
+});
+
+const commonPropers = new Map<string, ProperText>();
+for (const mod of Object.values(modules)) {
+  commonPropers.set(mod.default.id, mod.default);
+}
+
+export function getCommonProper(id: string): ProperText {
+  const proper = commonPropers.get(id);
+  if (proper) {
+    return proper;
+  }
+  // Same "resolve as pending" convention as psalm/martyrology/regula lookups
+  // — an unauthored id isn't a bug, it's content waiting to be written.
+  return { id, text: {}, status: { la: 'missing', en: 'missing' } };
+}
+
+export type { ProperText } from './types';

src/propers/types.ts

@@ -0,0 +1,11 @@
+import type { LanguageCode, TranslationStatus } from '../psalter/types';
+
+/** One fixed (non-day-variable) text used across hours — a hymn, a collect, a
+ * whole Preces block, etc. Keyed by id, matching PropersRef.id. */
+export interface ProperText {
+  id: string;
+  text: Partial<Record<LanguageCode, string>>;
+  status: Partial<Record<LanguageCode, TranslationStatus>>;
+  /** e.g. "1 Tim 1:17" — set when this proper is a scripture quotation. */
+  citation?: Partial<Record<LanguageCode, string>>;
+}