Author 10 sanctoral Common-category Magnificat antiphons

getMagnificatAntiphon's Common-category fallback
(magnificat-antiphon-${benedictusCommon}) had never been authored for
any of the 11 real Common categories saints fall back to -- only the
temporal-cycle side of this gap had been closed previously. Sourced
each from its Commune file's own [Ant 3] (Second Vespers), live-verified
against Ss. Placid and Companions, St. Blaise, and St. John Gualbert's
real evenings.

common-of-a-vigil (the 11th category) is handled separately, in code --
see the next commit.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014QEe9oTbn1UjQVAYcCoW1a

src/data/propers/common/magnificat-antiphon-common-of-several-women-martyrs.yml

@@ -0,0 +1,14 @@
+# Second Vespers Magnificat antiphon for `common-of-several-women-martyrs`
+# (Commune plurimarum non Virginum Martyrum, Latin/Commune/C7b.txt) --
+# its own [Ant 2] and [Ant 3] are both bare `@:Ant 1` cross-references,
+# i.e. this small Common reuses one single antiphon at Lauds and both
+# Vespers alike. Same text as the already-authored
+# benedictus-antiphon-common-of-several-women-martyrs.yml (itself read
+# from this file's [Ant 1]), by design, not by coincidence.
+id: magnificat-antiphon-common-of-several-women-martyrs
+text:
+  la: "Istárum est enim * regnum cælórum, quæ contempsérunt vitam mundi, et pervenérunt ad prǽmia regni, et lavérunt stolas suas in sánguine Agni."
+  en: "For theirs is * the Kingdom of heaven who love not their lives in this world, and have attained unto the reward of the Kingdom, and have washed their robes in the blood of the Lamb."
+status:
+  la: verified
+  en: verified