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-a-confessor.yml

@@ -0,0 +1,17 @@
+# Second Vespers Magnificat antiphon for `common-of-a-confessor`
+# (Commune Confessoris non Pontificis, Latin/Commune/C5.txt's own [Ant 3]
+# -- confirmed by position/label against the file's Vespers1(Ant1) ->
+# Matins -> Lauds(Ant2) -> minor hours -> Vespers2(Ant3) layout, and
+# live-verified directly: St. John Gualbert (07-12-2026) and St. Odo's
+# Common-of-an-Abbot fallback (which resolves to this same C5 file, no
+# override -- see benedictus-antiphon-common-of-an-abbot.yml's own
+# comment) both render this exact text at their own Second Vespers.
+# Same underlying text as `magnificat-antiphon-common-of-an-abbot.yml`
+# by design -- both vu categories share this one Commune file.
+id: magnificat-antiphon-common-of-a-confessor
+text:
+  la: "Hic vir despíciens mundum * et terréna, triúmphans, divítias cælo cóndidit ore, manu."
+  en: "Lo, a servant of God * who esteemed but little things earthly. And by word and work laid him up treasure in heaven."
+status:
+  la: verified
+  en: verified