Add Our Lady of the Snows (Aug 5) to the calendar

Previously excluded entirely under a stale "fixed BVM feasts aren't
modeled" note -- wrong: this app already models three other fixed BVM
feasts (assumption, immaculate-conception, nativity-bvm), and this one
has real, complete content too. Sancti/08-05.txt's untagged rank block
gives her Duplex Majus with real Nocturn 2/3 content (the
miraculous-snowfall founding legend of St. Mary Major); SanctiM/08-05.txt
confirms she's on the Monastic 1617 track too, reslicing the same
Lectio4-6.

Unlike the other three BVM feasts, she has no proper collect or
Benedictus antiphon of her own (her Rule says "ex C11" -- Common of
Feasts of the BVM) -- collect-c11.yml and
benedictus-antiphon-common-of-the-bvm.yml are real, reusable Common
templates, wired via collectCommon/benedictusCommon like any other
Common-only saint, not a private per-saint duplicate.

Live-checked via direct resolution: she wins outright on 2026-08-05 and
2027-08-05, with antiphon, collect, and Matins reading all resolving
verified. npm test (365 tests) and tsc --noEmit both pass.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/data/propers/common/benedictus-antiphon-common-of-the-bvm.yml

@@ -0,0 +1,13 @@
+# Verified against the reference engine's own source data files:
+# web/www/horas/Latin/Commune/C11.txt's own [Ant 1] ("In Festis Beatae
+# Mariae Virginis" -- Common of Feasts of the BVM) and its English
+# counterpart. Reusable by any BVM feast keyed to `common: common-of-
+# the-bvm` (SaintRecord.benedictusCommon) that has no proper Benedictus
+# antiphon of its own -- e.g. our-lady-of-the-snows.yml.
+id: benedictus-antiphon-common-of-the-bvm
+text:
+  la: "Sancta María, * succúrre míseris, juva pusillánimes, réfove flébiles, ora pro pópulo, intérveni pro clero, intercéde pro devóto femíneo sexu: séntiant omnes tuum juvámen, quicúmque célebrant tuam sanctam festivitátem."
+  en: "O Holy Mary, * be thou an help to the helpless, a strength to the fearful, a comfort to the sorrowful; pray for the people, plead for the clergy, make intercession for all women vowed to God: may all that are keeping this thine holy Feast-day feel the might of thine assistance."
+status:
+  la: verified
+  en: verified

src/data/propers/common/collect-c11.yml

@@ -0,0 +1,24 @@
+# Verified against the reference engine's own source data files:
+# web/www/horas/Latin/Commune/C11.txt ("In Festis Beatae Mariae
+# Virginis" -- Common of Feasts of the BVM) and its English counterpart.
+# Unlike the collect-c*.yml martyr/confessor/virgin Commons, this
+# formula addresses "fámulis tuis" generically rather than naming the
+# saint (`beátæ N.`) -- no `{N}` placeholder, nothing to substitute; a
+# saint using this via SaintRecord.collectCommon still needs
+# `collectName` set (getDayCollect requires both), but its value is
+# never actually inserted into this particular template.
+id: collect-c11
+text:
+  la: |
+    Orémus.
+    Concéde nos fámulos tuos, quǽsumus, Dómine Deus, perpétua mentis et córporis sanitáte gaudére: et, gloriósa beátæ Maríæ semper Vírginis intercessióne, a præsénti liberári tristítia, et ætérna pérfrui lætítia.
+    Per Dóminum nostrum Jesum Christum, Fílium tuum: qui tecum vivit et regnat in unitáte Spíritus Sancti, Deus, per ómnia sǽcula sæculórum.
+    ℟. Amen.
+  en: |
+    Let us pray.
+    Grant, we beseech thee, O Lord God, unto all thy servants, that they may remain continually in the enjoyment of soundness both of mind and body, and by the glorious intercession of the Blessed Mary, always a Virgin, may be delivered from present sadness, and enter into the joy of thine eternal gladness.
+    Through Jesus Christ, thy Son our Lord, Who liveth and reigneth with thee, in the unity of the Holy Ghost, God, world without end.
+    ℟. Amen.
+status:
+  la: verified
+  en: verified

src/data/propers/nocturn-readings/our-lady-of-the-snows.yml

@@ -0,0 +1,72 @@
+# Matins Nocturn 2 reading for Our Lady of the Snows (Dedication of St.
+# Mary Major), Aug 5 — Duplex Majus. `Sancti/08-05.txt`'s untagged
+# [Rank] block. SanctiM/08-05.txt inherits the whole day (`@Sancti/08-05`)
+# with no Nocturn 2/3 override (just reslicing Lectio4-6 into a 12-lesson
+# Monastic structure via `@Sancti/08-05:LectioN` cross-references), so
+# this feast's own content is sourced from the Tridentine track directly.
+# web/www/horas/Latin/Sancti/08-05.txt, English/Sancti/08-05.txt.
+# Lectio4-6 combined into one reading — the miraculous-snowfall founding
+# legend of the basilica of St. Mary Major, one continuous narrative, no
+# genuine source break. (The source's own `[Lectio94]` is a shorter,
+# alternate simplex-rank retelling of the same story, not additional
+# content — not authored separately.)
+id: our-lady-of-the-snows
+readings:
+  - nocturn: 2
+    isGospel: false
+    text:
+      la: >-
+        Liberio summo Pontifice, Joánnes patricius Romanus et uxor pari nobilitate, cum
+        liberos non suscepíssent, quos bonórum herédes relínquerent, suam hereditátem
+        sanctíssimæ Virgini Dei Matri vovérunt, ab ea summis precibus assidue peténtes, ut in
+        quod pium opus eam pecúniam potíssimum erogari vellet aliquo modo significaret.
+        Quorum preces et vota, ex animo facta, beáta Virgo Maria, benígne áudiens, miraculo
+        comprobávit.
+
+
+        Nonis ígitur Augusti, quo témpore in Urbi maximi calóres esse solent, noctu nix
+        partem collis Exquilini contéxit. Qua nocte Dei Mater separatim Joánnem et conjugem
+        in somnis admonuit ut quem locum nive conspersum vidérent, in eo ecclésiam
+        ædificarent, quæ Maríæ vírginis nómine dedicarétur; se enim ita velle ab ipsis
+        herédem institui. Quod Joánnes ad Libérium Pontificem détulit, qui idem per sómnium
+        sibi contigisse affirmávit.
+
+
+        Quare solemni sacerdotum et pópuli supplicatióne ad collem venit nive coopertum, et
+        in eo locum ecclésiæ designávit, quæ Joánnis et uxoris pecúnia exstructa est, póstea
+        a Xysto tertio restituta. Variis nomínibus primum est appellata, basilica Liberii,
+        sancta Maria ad Præsepe; sed, cum multæ jam essent in Urbe ecclésiæ sub nómine sanctæ
+        Maríæ Vírginis, ut quæ basilica novitate miraculi ac dignitate ceteris ejusdem
+        nóminis basilicis præstaret, vocabuli étiam excelléntia significarétur, ecclésia
+        sanctæ Maríæ majoris dicta est. Cujus dedicatiónis memória ex nive, quæ hac die
+        mirabíliter cécidit, anniversaria celebritate cólitur.
+      en: >-
+        In the time of Pope Liberius, there lived at Rome a certain nobleman named John and a
+        noble lady his wife, who had no children to whom to leave their substance. Then they
+        vowed that they would make the most holy Virgin Mother of God their heiress, and
+        earnestly besought her in some way to make known to them upon what godly work she
+        would that the money should be spent. The Blessed Virgin Mary graciously listened to
+        their prayers and heart-felt earnestness, and by a miracle assured them of her will.
+
+
+        On the 5th day of August, which is that time when the heat of summer waxeth greatest
+        in Rome, a part of the Esquiline Hill was covered by night with snow. And on this
+        same night the Mother of God appeared in a dream to John and his wife separately, and
+        told them that on that spot, which in the morning they should see clad with snow,
+        they should build a Church, to be dedicated in the name of the Virgin Mary, for that
+        this was the way in which she chose that they should make her their heiress. John
+        went and told it to Pope Liberius, who declared that he also had been visited by a
+        like dream.
+
+
+        Therefore he came in a solemn procession of Priests and people to the snow-clad hill,
+        and traced upon that spot the plan of a Church which was built with the money of John
+        and his wife. It was afterwards rebuilt by Sixtus III. At the beginning it was called
+        by diverse names, sometimes the Liberian Basilica, sometimes the Church of St.
+        Mary-at-the-Manger. Howbeit, since there are in Rome many Churches called after the
+        Holy Virgin Mary, and this Church doth excel them all, both in honour, and because of
+        the strange sign wherewith it was dedicated, it hath come to be called the Church of
+        St. Mary, the Greater. The memory of the dedication thereof is kept every year by a
+        Feast-day that taketh name from the wonderful fall of snow which on this day took
+        place.
+    status: { la: verified, en: verified }