propers: add March's collect and antiphon text

Real collect text for all 6 March saints that have one, plus St. Joseph's
own antiphon — same extraction method as January/February.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

tests/calendar/march-sanctoral.test.ts

@@ -0,0 +1,41 @@
+import { describe, expect, it } from 'vitest';
+import { resolveDay } from '../../src/calendar';
+import { getDayCollect } from '../../src/hours/resolve-common';
+
+// Clean per-annum years for these dates (no Sunday collision; for Mar 4/9
+// specifically, clear of the movable Lenten ferias that usually overshadow
+// them) — see data/calendar/saints/*.yml for per-saint source detail.
+describe('March sanctoral pull (first pass)', () => {
+  it('St. Joseph wins outright with a real proper collect and antiphon', () => {
+    const day = resolveDay('2033-03-19');
+    expect(day.winner).toEqual({
+      kind: 'sanctoral',
+      id: 'st-joseph',
+      name: 'St. Joseph, Spouse of the Blessed Virgin Mary, Confessor',
+      rank: 'duplex',
+    });
+    expect(getDayCollect(day).status.en).toBe('verified');
+  });
+
+  it('the Forty Holy Martyrs (one feast, several martyrs) resolve like any other saint', () => {
+    const day = resolveDay('2033-03-10');
+    expect(day.winner).toEqual({
+      kind: 'sanctoral',
+      id: 'forty-holy-martyrs',
+      name: 'The Forty Holy Martyrs',
+      rank: 'semiduplex',
+    });
+    expect(getDayCollect(day).status.en).toBe('verified');
+  });
+
+  it("St. Benedict wins outright at Duplex I. classis despite having no unique propers at all", () => {
+    const day = resolveDay('2033-03-21');
+    expect(day.winner).toEqual({
+      kind: 'sanctoral',
+      id: 'st-benedict',
+      name: 'St. Benedict, Abbot (Transitus)',
+      rank: 'duplex-1-classis',
+    });
+    expect(getDayCollect(day).status.en).toBe('missing');
+  });
+});