Fix Matins bible-plan readings stuck on stale "translation pending"

resolveReading() in bible-plan.ts preferred each YAML row's hardcoded
status: { la: missing, en: missing } over computing status from the
actually-resolved text. That field was accurate before the Vulgate/
Douay-Rheims bulk import but was never cleared once real text landed,
so every Matins bible-plan reading kept showing as untranslated
regardless. Strip the stale field from all 368 files so status falls
through to the real compute-from-resolved-text path.

Also alias book abbreviations in scripture/index.ts's lookup: the
bulk-imported store uses Vulgate-numbering codes (sap, jac, joan,
1reg..4reg, 1par/2par, 1esdr/2esdr, ...) matching octave-readings.ts's
existing convention, while bible-plan.ts's TSV import used common
English abbreviations (kgs, sam, chr, john, jas, luke, mark, ...) for
the ~30 books where the two conventions diverge. Alias at the lookup
layer so citations keep their familiar English display form.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Je2mXNHoXmi1DS3xEL67rH

src/data/hours/bible-plan/advent-2-saturday.yml

@@ -5,7 +5,5 @@ readings:
   - passages:
       - { book: isa, chapter: 29 }
       - { book: isa, chapter: 30 }
-    status: { la: missing, en: missing }
   - passages:
       - { book: sap, chapter: 12 }
-    status: { la: missing, en: missing }