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>

src/data/propers/common/forty-holy-martyrs-collect.yml

@@ -0,0 +1,19 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617) — read
+# directly from the reference engine's own real-date output (2033-03-10, a
+# year that date doesn't collide with a Sunday). Same convention as
+# data/propers/temporal/*-collect.yml.
+id: forty-holy-martyrs-collect
+text:
+  la: |
+    Orémus.
+    Præsta, quǽsumus, omnípotens Deus: ut, qui gloriósos Mártyres fortes in sua confessióne cognóvimus, pios apud te in nostra intercessióne sentiámus.
+    Per Dóminum nostrum Jesum Christum, Fílium tuum: qui tecum vivit et regnat in unitáte Spíritus Sancti, Deus, per ómnia sǽcula sæculórum.
+    ℟. Amen.
+  en: |
+    Let us pray.
+    Grant, we beseech thee, O Almighty God, that we who know thy glorious Martyrs to have been in their testimony leal and true towards thee, may, now that they are with thee, feel them to be in their petitions pitiful towards us.
+    Through Jesus Christ, thy Son our Lord, Who liveth and reigneth with thee, in the unity of the Holy Ghost, God, world without end.
+    ℟. Amen.
+status:
+  la: verified
+  en: verified