Give the Matins invitatory antiphon a real weekday cycle

The plain ferial fallback was a single fixed year-round text that was
actually just Monday's own antiphon, mislabeled in its own comment as
live-verified for 2026-09-06 (a Sunday). The real Monastic 1617 source
genuinely varies this antiphon Sunday-Saturday, same shape as the Matins
hymn's own weekday cycle. Adds the six missing weekday variants and
dispatches on weekday in resolveMatinsInvitatoryText.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01W8cttEhwbN3f6hiHQHqCae

src/data/propers/common/matins-invitatory-antiphon-tuesday.yml

@@ -0,0 +1,11 @@
+# Tuesday's own plain ferial Matins invitatory antiphon (Psalterium/
+# Special/Matutinum Special.txt's "Invit Trid_" block, `Feria III=`).
+# See matins-invitatory-antiphon-sunday.yml's header for the weekday-cycle
+# mechanism this belongs to; live-verified 2026-09-06.
+id: matins-invitatory-antiphon-tuesday
+text:
+  la: "Jubilémus Deo, * Salutári nostro."
+  en: "Let us make a joyful noise to * the God of our salvation."
+status:
+  la: verified
+  en: verified