Extend closing Gloria Patri to canticles, centralize instead of baking it in

Benedictus, Magnificat, and Nunc Dimittis had the Gloria Patri baked
verbatim into their propers YAML with no Triduum suppression; Matins'
Nocturn 3 OT canticles had none at all. Give the 'canticle' ResolvedPart
the same centrally-attached gloriaPatri field psalms already got, strip
the baked-in text, and drop Lauds' now-redundant local append/Triduum
check — live-verified that canticles follow the exact same Triduum-only
omission as psalms (e.g. Benedictus at Lauds of Holy Thursday).

src/data/propers/common/benedictus.yml

@@ -1,7 +1,10 @@
 # Verified against Divinum Officium (Monastic Tridentinum 1617), Lauds live
 # query. Fixed year-round, same shape as nunc-dimittis.yml — the framing
 # antiphon is resolved separately, by day (see hours/resolve-common.ts's
-# getBenedictusAntiphon), not stored here.
+# getBenedictusAntiphon), not stored here. The closing Gloria Patri isn't
+# stored here either — it's attached centrally (hours/index.ts) so it can
+# be omitted during the Sacred Triduum (live-verified: Divino Afflatu 1954
+# and Tridentine 1906 both omit it at Lauds of Holy Thursday).
 id: benedictus
 text:
   la: |
@@ -17,8 +20,6 @@ text:
     Ad dandam sciéntiam salútis plebi ejus: * in remissiónem peccatórum eórum:
     Per víscera misericórdiæ Dei nostri: * in quibus visitávit nos, óriens ex alto:
     Illumináre his, qui in ténebris, et in umbra mortis sedent: * ad dirigéndos pedes nostros in viam pacis.
-    V. Glória Patri, et Fílio, * et Spirítui Sancto.
-    R. Sicut erat in princípio, et nunc, et semper, * et in sǽcula sæculórum. Amen.
   en: |
     Blessed be the Lord ✠ God of Israel; * because he hath visited and wrought the redemption of his people:
     And hath raised up an horn of salvation to us, * in the house of David his servant:
@@ -32,8 +33,6 @@ text:
     To give knowledge of salvation to his people, * unto the remission of their sins:
     Through the bowels of the mercy of our God, * in which the Orient from on high hath visited us:
     To enlighten them that sit in darkness, and in the shadow of death: * to direct our feet into the way of peace.
-    V. Glory be to the Father, and to the Son, * and to the Holy Ghost.
-    R. As it was in the beginning, is now, * and ever shall be, world without end. Amen.
 citation:
   la: "Luc. 1:68-79"
   en: "Luke 1:68-79"