propers: add July's collect and antiphon text

Real collect text for all 9 July saints that have one, plus St. Mary
Magdalene's own antiphon — same extraction method as prior months.

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

src/data/propers/common/ss-seven-brothers-rufina-and-secunda-collect.yml

@@ -0,0 +1,18 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617) — read
+# directly from the reference engine's own real-date output (2028-07-10).
+# Same convention as data/propers/temporal/*-collect.yml.
+id: ss-seven-brothers-rufina-and-secunda-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, almighty God, that we, who know how courageously thy holy Martyrs have confessed the faith, may experience their goodness as they intercede for us with thee.
+    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