Author 5 more wholly-proper feasts' own Matins invitatory antiphons

Same gap as All Saints: Finding of the Holy Cross, Exaltation of the
Holy Cross, Most Precious Blood, Transfiguration, and Visitation of the
BVM are all duplex-majus+ feasts with a fake "proper-to-*" common and no
matins-invitatory-<id>.yml of their own, so each fell through to the
plain ferial default. Sourced from each one's own Sancti/MM-DD.txt
[Invit] block (none has a Monastic override).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LGsATZvfnpQ81HQuoF5JuL

src/data/propers/common/matins-invitatory-exaltation-of-the-holy-cross.yml

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+# Read from web/www/horas/Latin/Sancti/09-14.txt's own [Invit] (no
+# Monastic override exists) and its English counterpart.
+id: matins-invitatory-exaltation-of-the-holy-cross
+text:
+  la: "Christum Regem pro nobis in Cruce exaltátum, * Veníte, adorémus."
+  en: "Come adore * Christ the King who was exalted to the cross for us."
+status:
+  la: verified
+  en: verified

src/data/propers/common/matins-invitatory-finding-of-the-holy-cross.yml

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+# Read from web/www/horas/Latin/Sancti/05-03.txt's own [Invit] (no
+# Monastic override exists) and its English counterpart.
+id: matins-invitatory-finding-of-the-holy-cross
+text:
+  la: "Christum Regem crucifíxum, * Veníte, adorémus. (Allelúja.)"
+  en: "Christ crucified is our King. * O come, let us worship Him. (Alleluia.)"
+status:
+  la: verified
+  en: verified

src/data/propers/common/matins-invitatory-most-precious-blood.yml

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+# Read from web/www/horas/Latin/Sancti/07-01.txt's own [Invit] (no
+# Monastic override exists) and its English counterpart.
+id: matins-invitatory-most-precious-blood
+text:
+  la: "Christum Dei Fílium, qui suo nos redémit sánguine, * Veníte, adorémus."
+  en: "Christ, the Son of God, hath redeemed us by His Own Blood, * O come, let us worship Him."
+status:
+  la: verified
+  en: verified

src/data/propers/common/matins-invitatory-transfiguration.yml

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+# Read from web/www/horas/Latin/Sancti/08-06.txt's own [Invit] (no
+# Monastic override exists) and its English counterpart.
+id: matins-invitatory-transfiguration
+text:
+  la: "Summum Regem glóriæ, * Christum adorémus."
+  en: "The Most High King, the King of glory, even Christ, * Him let us worship."
+status:
+  la: verified
+  en: verified

src/data/propers/common/matins-invitatory-visitation-of-the-bvm.yml

@@ -0,0 +1,9 @@
+# Read from web/www/horas/Latin/Sancti/07-02.txt's own [Invit] (no
+# Monastic override exists) and its English counterpart.
+id: matins-invitatory-visitation-of-the-bvm
+text:
+  la: "Visitatiónem Vírginis Maríæ celebrémus: * Christum ejus Fílium adorémus Dóminum."
+  en: "Let us keep holiday for the Visitation of the Virgin Mary. * Let us worship Christ, her Son, and her Lord and ours."
+status:
+  la: verified
+  en: verified