Add St. Francis Xavier (Dec 3) sanctoral content

Own real Oratio and Nocturn 2-3 content (Duplex majus). This was the
only real gap left in December -- the rest of the month was already
complete from the earlier pre-1955 sanctoral pull. No test collisions:
Dec 3 was genuinely open.

This closes out the full-year sanctoral sweep (January-December).

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

src/data/propers/common/st-francis-xavier-collect.yml

@@ -0,0 +1,25 @@
+# Read directly from web/www/horas/Latin/Sancti/12-03.txt's own
+# [Oratio] and its English counterpart. Doxology "$Per Dominum"
+# spelled out per the convention in st-bibiana-collect.yml.
+id: st-francis-xavier-collect
+text:
+  la: |
+    Orémus.
+    Deus, qui Indiárum gentes beáti Francísci prædicatióne et miráculis
+    Ecclésiæ tuæ aggregáre voluísti: concéde propítius; ut cujus
+    gloriósa mérita venerámur, virtútum quoque imitémur exémpla.
+    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.
+    O God, who wast pleased, by the preaching and miracles of blessed
+    Francis, to add the nations of the Indies to thy Church; mercifully
+    grant that, as we venerate his glorious merits, so we may also
+    follow the example of his virtues.
+    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