propers: add October's collect text

7 collects. Also moves two pre-existing tests' dates off Oct 4-5, which
now carry real sanctoral content (St. Francis, Ss. Placid and
Companions) that changes their governing behavior -- same class of
collision as previous months.

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

src/data/propers/common/vigil-of-all-saints-collect.yml

@@ -0,0 +1,17 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617) — read
+# directly from the reference engine's own real-date output (2025-10-31).
+id: vigil-of-all-saints-collect
+text:
+  la: |
+    Orémus.
+    Dómine, Deus noster, multíplica super nos grátiam tuam: et, quorum prævenimus gloriósa solemnia, tríbue subsequi in sancta professióne lætítiam.
+    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.
+    Pour forth abundantly upon us of thy mercy, O Lord our God, and grant us grace to follow in their joy in their holy testifying all thy blessed servants the Eve of whose glorious and solemn Commemoration we are keeping.
+    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