Switch Prime's Sunday/feast Preces to the secular Tridentine form

Monastic Prime's own Dominicales Preces drop the "Et ego ad te, Domine,
clamavi..." versicle block and shorten the closing "Miserere nostri,
Domine... Fiat misericordia tua..." set. Prefer the secular Tridentine
form instead (live-verified against Divinum Officium's "Tridentine -
1906" version), keeping "beato Patri nostro Benedicto" in the Confiteor
by explicit choice even though the real secular Confiteor omits it.

The Sunday/ferial by-day-kind split stays as-is; the ferial form
(prime-preces-feriales.yml) is unchanged and continues to show on every
ferial day by deliberate choice, more generously than the historical
rubric.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HWN869GrMFHqrer9fdCBbF

src/data/propers/common/prime-preces-feriales.yml

@@ -1,10 +1,13 @@
 # Verified against Divinum Officium ("Psalterium/Special/Preces.txt",
-# [Preces feriales Prima] section) — the same content is used regardless of
-# rubric (Monastic or Roman), unlike prime-preces.yml's Dominicales form
-# which the Monastic rubric shortens (skips straight to the Confiteor
-# cluster). Used on plain ferial days (see calendar/isSundayOrFeast) — by
-# explicit choice, every ferial day, not just Advent/Lent/vigils/Ember days
-# the way later rubrics restricted it.
+# [Preces feriales Prima] section) — the older, pre-1911-reform ferial-only
+# Preces form. Used on plain ferial days (see calendar/isSundayOrFeast) —
+# by explicit choice, currently *every* ferial day, not just the
+# Advent/Lent/vigils/Ember days later rubrics actually restricted it to;
+# under the live-verified secular Tridentine rubric this text doesn't
+# appear on an ordinary ferial day at all (that gets
+# prime-preces-dominicales.yml's unified form instead, same as Sunday) —
+# see hours/prime.yml's header. Narrowing when this file's text actually
+# applies is a known future fix, not done yet.
 id: prime-preces-feriales
 text:
   la: |