Build the Vespers ordo: mechanism, weekday content, seasonal content

Wires resolveOrdo('vespers', ...) end to end: opening versicle,
weekday psalmody (4 groups, handling the joined Ps 115+116 and the
split Ps 138/143 via a PsalmRef-like shape), the chapter/responsory/
hymn/versicle office bundle, Magnificat, day-collects — reusing
resolveEveningDay so First/Second Vespers precedence and the cross-day
commemoration (both added in the previous commit) apply automatically
— and a closing that reuses Lauds' own conclusio, since no distinct
"Vespera" version of that exact text turned up in the source.

getMagnificatAntiphon mirrors getBenedictusAntiphon's saint/temporal-id
lookup order, but also falls back to real content Benedictus has no
equivalent of: the classic ferial set that quotes the Magnificat's own
text in sequence across the week, with the correct Monastic-rubric
variant picked for Tue/Thu/Fri/Sat (two of those needed a fresh
translation where the Monastic Latin diverges from the given English
in content, not just wording).

Also includes Vespers' own seasonal content (Advent/Lent/Passiontide/
Paschaltide chapter+responsory+hymn+versicle), transcribed from the
same source blocks as the weekday content, with the Monastic-specific
hymn variants hand-applied from the source's substitution notation
against each base Roman text (one transcription slip caught and fixed
mid-pass: the Passiontide hymn's closing lines had been copied from
the Roman text instead of the Monastic one actually being
transcribed). Passiontide's own responsory/hymn correctly omit the
Gloria Patri, matching real rubric and the source data as given.

All weekday/seasonal content marked `draft`, not `verified` — read
directly from the reference source, not cross-checked against a live
rendering per day the way the psalmody was.

Six other hours' resolvePart switches needed the three new HourPart
kinds ('vespers-psalmody', 'vespers-office', 'magnificat') added to
their exhaustive not-used lists so they still typecheck; three
pre-existing tests assumed Vespers was still "coming soon" and are
updated to exercise Matins (still the genuine stub) instead.

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

src/data/propers/common/vespers-hymn-paschaltide.yml

@@ -0,0 +1,96 @@
+# Sourced from Divinum Officium's Monastic block ("[HymnusM Pasch
+# Vespera]", Psalterium/Special/Major Special.txt) — "Ad cenam Agni
+# próvidi", the older Monastic form, full separate text (not a
+# substitution against the Roman Urban VIII revision, "Ad régias Agni
+# dapes", which differs substantially stanza by stanza, not just in
+# wording). English is the given translation of that Roman revision —
+# conventionally paired with this older Latin in many hymnals despite the
+# textual differences, but a real mismatch worth flagging, same caution
+# as the Sunday Vespers hymn. Not live-query-verified (see TODO.md).
+id: vespers-hymn-paschaltide
+text:
+  la: |
+    Ad cenam Agni próvidi,
+    Et stolis albis cándidi,
+    Post tránsitum maris Rubri,
+    Christo canámus Príncipi.
+
+    Cujus corpus sanctíssimum,
+    In ara crucis tórridum,
+    Cruóre ejus róseo
+    Gustándo vívimus Deo.
+
+    Protécti Paschæ véspere
+    A devastánte Angelo,
+    Erépti de duríssimo
+    Pharaónis império.
+
+    Jam Pascha nostrum Christus est,
+    Qui immolátus agnus est:
+    Sinceritátis ázyma,
+    Caro ejus obláta est.
+
+    O vere digna hóstia,
+    Per quam fracta sunt tártara,
+    Redémpta plebs captiváta,
+    Réddita vitæ prǽmia.
+
+    Consúrgit Christus túmulo,
+    Victor redit de bárathro,
+    Tyránnum trudens vínculo,
+    Et Paradísum réserans.
+
+    Quǽsumus, Auctor ómnium,
+    In hoc pascháli gáudio,
+    Ab omni mortis ímpetu
+    Tuum defénde pópulum.
+
+    Glória tibi Dómine,
+    Qui surrexísti a mórtuis,
+    Cum Patre et Sancto Spíritu,
+    In sempitérna sǽcula.
+    Amen.
+  en: |
+    At the Lamb's high feast we sing
+    Praise to our victorious King,
+    Who hath washed us in the tide
+    Flowing from his pierced side.
+
+    Praise we him whose love divine
+    Gives the guests his blood for wine,
+    Gives his body for the feast,
+    Love the victim, love the priest.
+
+    Where the paschal blood is poured,
+    Death's dark angel sheathes his sword;
+    Israel's hosts triumphant go
+    Through the wave that drowns the foe.
+
+    Christ, the Lamb whose blood was shed,
+    Paschal victim, paschal bread;
+    With sincerity and love
+    Eat we manna from above.
+
+    Mighty victim from the sky,
+    Powers of hell beneath thee lie;
+    Death is conquered in the fight;
+    Thou hast brought us life and light.
+
+    Now thy banner thou dost wave;
+    Vanquished Satan and the grave;
+    Angels join his praise to tell —
+    See o'erthrown the prince of hell.
+
+    Paschal triumph, paschal joy,
+    Only sin can this destroy;
+    From the death of sin set free,
+    Souls re-born, dear Lord, in Thee.
+
+    Hymns of glory, songs of praise,
+    Father, unto thee we raise;
+    Risen Lord, all praise to thee,
+    Ever with the Spirit be.
+    Amen.
+status:
+  la: draft
+  en: draft