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Closes the last content gap flagged when Circumcision was added: its rubric borrows Christmas Day's propers wholesale, but Christmas Day itself has no hymn authored anywhere in vu yet. Lauds reuses the already-verified Christmas Octave Sunday text (byte-identical in the source); Vespers/Matins use the Monastic "Christe Redemptor omnium", a genuinely separate hymn from the secular "Jesu, Redemptor omnium", with a fresh draft English translation since none exists in the reference engine for that variant. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014axryJBrRswYh2niA7WCUc