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/hours/prime.yml

@@ -30,6 +30,18 @@
 # ferial Preces are said on *every* ferial day, not just Advent/Lent/
 # vigils/Ember days the way later rubrics restricted them.
 #
+# Preces deliberately use the *secular* Tridentine form
+# (propers/common/prime-preces-dominicales.yml), not Monastic Prime's own
+# shorter Dominicales form — chosen because the secular form keeps content
+# (the "Et ego ad te, Domine, clamavi..." versicle block; the fuller
+# "Miserere nostri, Domine... Fiat misericordia tua..." close) that
+# Monastic Prime drops. Under the live-verified secular Tridentine rubric
+# this same unified form is actually said on *every* day Preces are said
+# (Sunday and ferial alike, since Pius X's reform) — prime-preces-
+# feriales.yml's separate (older, pre-reform) ferial-only text is kept
+# wired up here anyway, by explicit choice, pending a future fix to gate
+# it to the narrower set of days it should actually apply to.
+#
 # The dead-commemoration psalm (129, De profundis) is dropped by explicit
 # choice — a deliberate time-saving cut, not an oversight. The intro/close
 # responsory and collect around it are kept.