Import the Purification's own proper Lauds/Vespers chapter

Live-verified against Divinum Officium (Monastic Tridentinum 1617),
2026-02-02 (fixed date, always winnable): only the chapter is genuinely
her own (Mal 3:1, "Ecce ego mitto Angelum meum"). Responsory, both
hymns, and both versicles are all byte-identical to Common-of-the-BVM's
own already-authored content -- duplicated under her own id.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014axryJBrRswYh2niA7WCUc

tests/hours/lauds.test.ts

@@ -351,6 +351,17 @@ describe('resolveOrdo("lauds", ...)', () => {
     expect(hymn?.kind === 'hymn' ? hymn.text.text.la : undefined).toContain('O gloriósa Dómina');
   });
 
+  it("resolves the Purification's own proper chapter, with Common-of-the-BVM's hymn", () => {
+    // Live-verified against Divinum Officium (Monastic Tridentinum
+    // 1617), 2026-02-02 (fixed date, always winnable). See lauds-
+    // capitulum-purification.yml's header.
+    const ordo = resolveOrdo('lauds', '2026-02-02');
+    const chapter = ordo.parts.find((p) => p.kind === 'chapter');
+    expect(chapter?.kind === 'chapter' ? chapter.text.citation?.en : undefined).toBe('Mal 3:1');
+    const hymn = ordo.parts.find((p) => p.kind === 'hymn');
+    expect(hymn?.kind === 'hymn' ? hymn.text.text.la : undefined).toContain('O gloriósa Dómina');
+  });
+
   it('includes the Kyrie + Our Father lead-in right after the Benedictus, before the day collect (either form)', () => {
     const ordo = resolveOrdo('lauds', FERIAL_TUESDAY);
     const litanyIndex = ordo.parts.findIndex((p) => p.kind === 'preces' && p.text.text.la?.includes('Kýrie, eléison'));