Complete Marian Saturday: proper Matins/Lauds hymns, ferial antiphons

Design (direct instruction): Marian Saturday is its own rank tier,
between simplex and vigil in vu's FeastClass scale -- beats a plain
Simplex saint (commemorated in return), loses cleanly with zero trace
to anything Vigil-or-higher. Deliberately not the full historical
Officium Sabbatorum B.M.V. ("no little office"): ferial psalmody is
kept everywhere, only the antiphons swap to Marian text; Matins and
Lauds each get a real proper Marian hymn; the Marian collect applies
whenever the day wins.

The calendar-side mechanism (calendar/index.ts's applyMarianSaturday)
and a collect/Benedictus antiphon already existed from an earlier
session -- authored what was still missing: matins-hymn-marian-
saturday.yml (Matins had nothing at all) and lauds-{capitulum,
responsory,hymn,versicle}-marian-saturday.yml.

Also found and fixed 3 real bugs from that earlier, unverified pass:
Lauds' own hymn ("O gloriósa Dómina") was sitting under the plain
ferial lauds-hymn-saturday id instead of its own marian-saturday id;
that id's capitulum/responsory/versicle siblings were live-verified
from a different, privileged Lenten Ember Saturday, not a genuine
per-annum ferial Saturday -- corrected to the real content ("Auróra
jam spargit polum" / Rom 13:12-13 / "Sana ánimam meam" / "Repléti
sumus mane misericórdia tua", live-verified against a clean September
Ember Saturday); and the Lauds psalmody override used the real
historical proper psalm set (92/99/62) instead of the ferial one,
rolled back per direct instruction to plain ferial psalms (50, 142,
the split Canticle of Moses) with only the antiphons swapped.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AGjUyhUZJaSjiniEmnLdak

src/data/propers/common/lauds-hymn-marian-saturday.yml

@@ -0,0 +1,58 @@
+# Lauds hymn for Marian Saturday ("O gloriósa Dómina" / "O glorious
+# lady!") — live-verified against Divinum Officium (Monastic Tridentinum
+# 1617), Lauds live query, 2026-10-03 (a plain Sanctæ Mariæ Sabbato ~
+# Simplex day). Already the pre-Urban VIII text (this project's own
+# standing preference — see CLAUDE.md) as the reference source's own
+# default, not a separate choice made here.
+#
+# Fixed 2026-09-04: this text used to live at `lauds-hymn-saturday` (the
+# plain ferial-weekday id), on the reasoning that "a genuinely per-annum
+# unprivileged Saturday isn't achievable" — true for the *hymn*, but
+# `lauds-hymn-saturday.yml`'s own sibling capitulum/responsory/versicle
+# files turned out to be live-verified from a *different*, privileged
+# (Lenten Ember) Saturday, not this one — so reusing the ferial id for
+# just the hymn was silently gluing together content from two different
+# real occasions. Given a real `marian-saturday` id now exists to hold
+# the hymn on its own, moved here; see calendar/index.ts's
+# applyMarianSaturday and hours/resolve-common.ts's
+# ALWAYS_OVERRIDE_TEMPORAL_IDS for how this id actually gets selected.
+#
+# Closing doxology stanza intentionally omitted — handled seasonally via
+# hymn-doxology.ts, which already resolves this feast's own doxology
+# ("Glória tibi, Dómine, Qui natus es de Vírgine...") through
+# hymn-doxology-by-feast.yml's `marian-saturday: hymn-doxology-nat` entry.
+id: lauds-hymn-marian-saturday
+text:
+  la: |
+    O gloriósa Dómina,
+    Excélsa super sídera:
+    Qui te creávit, próvide
+    Lactásti sacro úbere.
+
+    Quod Heva tristis ábstulit,
+    Tu reddis almo gérmine:
+    Intrent ut astra flébiles,
+    Cæli fenéstra facta es.
+
+    Tu Regis alti jánua,
+    Et porta lucis fúlgida:
+    Vitam datam per Vírginem,
+    Gentes redémptæ, pláudite.
+  en: |
+    O glorious lady! throned on high
+    Above the star-illumined sky;
+    Thereto ordained, thy bosom lent
+    To thy Creator nourishment.
+
+    Through thy sweet offspring we receive
+    The bliss once lost through hapless Eve;
+    And heaven to mortals open lies
+    Now thou art portal of the skies.
+
+    Thou art the door of heaven's high King,
+    Light's gateway fair and glistering;
+    Life through a Virgin is restored;
+    Ye ransomed nations, praise the Lord!
+status:
+  la: verified
+  en: verified