compline: build the full hour, sharing Prime's resolver helpers

Ordo is Monastic 1617 as a base, with deliberate Tridentine 1906
additions: the "In manus tuas" short responsory, the Nunc Dimittis
with its "Salva nos" antiphon, the fuller Preces (Monastic's own is
shorter), and Lent's "Christe, qui lux es et dies" hymn replacement
(English translation marked draft, pending a real historical one).
Psalms 4, 90, 133 are fixed daily with real verified text, unlike
Prime's weekday-rotated psalms.

The closing Marian antiphon now picks Alma Redemptoris Mater / Ave
Regina Caelorum / Regina Caeli / Salve Regina by real season, using
the calendar work from the previous commit — except Ave Regina
Caelorum's own window (Candlemas through the day before Maundy
Thursday) doesn't align to any single season value, so that one case
checks the real date directly instead of going through the by-season
table.

resolve-common.ts extracts the resolve/status/doxology/antiphon
helpers Prime already had into something Compline can share; a few
propers files lose their "prime-" prefix now that both hours use them.

src/data/propers/common/compline-hymn.yml

@@ -0,0 +1,36 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), 2026-08-25
+# run. "Te lucis ante terminum" — only 2 body stanzas (the doxology, its 3rd
+# stanza, is stored separately since it varies by season — see
+# compline-hymn-doxology-per-annum.yml and hours/hymn-doxology.ts, same
+# mechanism as Prime's hymn).
+#
+# Monastic wording ("sólita"/"ad custódiam") differs slightly from the
+# Roman "pro tua"/"et custódia" — this is the Monastic form.
+#
+# Lent has its own distinct 6-stanza hymn ("Christe, qui lux es et dies")
+# rather than just a different doxology on this one — not modeled yet.
+id: compline-hymn
+text:
+  la: |
+    Te lucis ante términum,
+    Rerum Creátor, póscimus,
+    Ut sólita cleméntia
+    Sis præsul ad custódiam.
+
+    Procul recédant sómnia,
+    Et nóctium phantásmata;
+    Hostémque nostrum cómprime,
+    Ne polluántur córpora.
+  en: |
+    Before the ending of the day,
+    Creator of the world, we pray
+    That with thy wonted favor thou
+    Wouldst be our guard and keeper now.
+
+    From all ill dreams defend our eyes,
+    From nightly fears and fantasies;
+    Tread under foot our ghostly foe,
+    That no pollution we may know.
+status:
+  la: verified
+  en: verified