Rotate Terce/Sext/None psalm assignments for Wed/Thu/Fri/Sat

Wednesday and Friday now carry their own distinct psalm sets (formerly
Friday's and Saturday's, respectively); Tuesday, Thursday, and Saturday
share the gradual psalm set.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SVigobgkuEayoGdEiubBdt

src/data/hours/terce-antiphons.yml

@@ -9,16 +9,20 @@
 # Verified against Divinum Officium (Monastic Tridentinum 1617):
 #   - sunday/monday/tuesday: clean per-annum runs with no sanctoral
 #     override (2026-08-09 Sun, 2026-08-31 Mon, 2026-10-13 Tue).
-#   - wednesday/thursday: share Tuesday's antiphon — same native psalms
-#     (119-121), confirmed identical across all three.
-#   - friday/saturday: these two days' psalms were editorially
+#   - tuesday/thursday/saturday: share Tuesday's antiphon — same native
+#     psalms (119-121), confirmed identical across all three.
+#   - wednesday/friday: these two days' psalms were editorially
 #     redistributed (see psalter-distribution.yml's long comment on
 #     'terce'), so there's no real historical antiphon for this specific
 #     grouping. Per explicit decision, each is instead derived from the
-#     opening phrase of that day's first psalm (Ps 41 for Friday, Ps 69 for
-#     Saturday) — editorial, not independently verified against the
+#     opening phrase of that day's first psalm (Ps 41 for Wednesday, Ps 69
+#     for Friday) — editorial, not independently verified against the
 #     reference engine as a real antiphon, same caveat as the
 #     redistribution itself.
+#   - Wed/Thu/Fri/Sat were rotated 2026-08-28 (Wed's psalms moved to
+#     Saturday; Thu/Fri/Sat shifted back to Wed/Thu/Fri) then Wed and Thu
+#     were swapped again the same day, per explicit correction — see git
+#     history for the prior arrangements.
 sunday:
   la: "Allelúja."
   en: "Alleluia."
@@ -28,11 +32,11 @@ monday:
 tuesday: &gradual-terce-ant
   la: "Clamávi."
   en: "I cried unto the Lord."
-wednesday: *gradual-terce-ant
-thursday: *gradual-terce-ant
-friday:
+wednesday:
   la: "Quemádmodum desíderat cervus."
   en: "As the hart panteth."
-saturday:
+thursday: *gradual-terce-ant
+friday:
   la: "Deus, in adjutórium meum inténde."
   en: "O God, come to my assistance."
+saturday: *gradual-terce-ant