Bulk-author nameLa for all 299 remaining saints, close bilingual header backlog

Authors a real Latin nameLa for every saint in src/data/calendar/saints/
except the deliberate example-confessor placeholder (standard
ecclesiastical Latin forms, a lighter sourcing bar than this app's usual
reference-engine verification -- flagged for future spot-check). Fixes a
real mechanism bug found in the process: calendar/index.ts's sanctoral
collision-resolution branch was dropping nameLa for any saint that won
after beating another same-day candidate. Updates ~180 pre-existing test
fixtures across the calendar suite for the new field.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EwsZQMjALCvy7u9tFDWmuQ

tests/calendar/july-sanctoral.test.ts

@@ -11,10 +11,11 @@ describe('July sanctoral pull (first pass)', () => {
       kind: 'sanctoral',
       id: 'st-james-the-greater',
       name: 'St. James the Greater, Apostle',
+      nameLa: 'Sanctus Jacobus Major, Apostolus',
       rank: 'duplex-2-classis',
     });
     expect(day.commemorations).toEqual([
-      { kind: 'sanctoral', id: 'st-christopher', name: 'St. Christopher, Martyr', rank: 'simplex' },
+      { kind: 'sanctoral', id: 'st-christopher', name: 'St. Christopher, Martyr', nameLa: 'Sanctus Christophorus, Martyr', rank: 'simplex' },
     ]);
     expect(getDayCollect(day).status.en).toBe('verified');
   });
@@ -25,10 +26,11 @@ describe('July sanctoral pull (first pass)', () => {
       kind: 'sanctoral',
       id: 'st-apollinaris',
       name: 'St. Apollinaris, Bishop and Martyr',
+      nameLa: 'Sanctus Apollinaris, Episcopus et Martyr',
       rank: 'semiduplex',
     });
     expect(day.commemorations).toEqual([
-      { kind: 'sanctoral', id: 'st-liborius', name: 'St. Liborius, Bishop and Confessor', rank: 'simplex' },
+      { kind: 'sanctoral', id: 'st-liborius', name: 'St. Liborius, Bishop and Confessor', nameLa: 'Sanctus Liborius, Episcopus et Confessor', rank: 'simplex' },
     ]);
   });