879d4d607c
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Extends TemporalFeastRecord's date anchor from a single easterOffset number into a MovableAnchor union: 'easter' (unchanged), plus 'nth-sunday-of-month' (nth: -1 for "last") and 'nth-sunday-of-advent' -- both new anchor kinds resolve to "Nth Sunday counting from an anchor date," just with a different anchor (first-of-month vs. Advent's own start, which is itself always a Sunday). Adds calendar/temporal.ts's sundayOnOrAfter to support the month case. Migrates christ-the-king.yml onto the new nth-sunday-of-month anchor (month: 10, nth: -1) with a new `unconditional: true` flag replacing its old always-wins-no-rank-check bespoke function -- retiring applyChristTheKing and its lastSundayOfOctober helper from calendar/index.ts entirely. Down to two bespoke override functions left (marian-saturday's date-less fallback, christmas-octave-sunday's fixed-date-range Sunday search), both structurally different from the Nth-Sunday-from-anchor shape this table now covers. No behavior change -- the full existing Christ the King test suite passes unchanged through the new generic path. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01VZSAgRi4QE4XRTqVto93zA