Omit Lauds suffrages entirely during Advent/Christmastide/Passiontide and any active octave

Checked directly against Monastic Tridentinum 1617 (not just the
Tridentine 1906/1910 track the suffrage content itself comes from) --
this omission isn't a rubric-track-specific quirk, it holds under this
app's own primary source too:

- Advent, Christmastide, and Passiontide ferias: suffrages omitted
  entirely. Confirmed ordinary Lent (weeks 1-4, not Passiontide) is NOT
  excluded -- only the last two weeks are.
- Any day within an active octave: suffrages omitted entirely, however
  low that octave's own rank is -- confirmed against day 2/3 of St.
  Lawrence's own Semiduplex octave, well below the existing Duplex+
  threshold.

Today (within Lawrence's octave) was showing all five suffrages before
this fix; the real office has none but the Marian antiphon.

Still not modeled, flagged in TODO.md: Paschaltide's own substitution
(a single alleluia-form "Suffragium Paschale" replaces the whole set
during Eastertide, rather than the ordinary set showing or being
omitted) -- a separate, larger feature.

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

TODO.md

@@ -271,14 +271,20 @@ real `draft` status went through it.
 - `getDayCollects`: each collect in a multi-collect day renders as its own
   complete "Let us pray ... Amen." block, not the more compressed real form
   (one "Let us pray," only the last collect's doxology).
-- Suffrage omission only checks `omitOnDouble` (+ Marian Saturday's own
-  Cross/BVM filter, + Christ the King's explicit id check, + the Cross-only
-  ferial-office check added 2026-08). Real seasonal suppression is still
-  missing: per the Tridentine 1906/1910 source (`specials.pl`'s
-  `checksuffragium`), suffrages are omitted *entirely* during Advent,
-  Christmastide, and Passiontide, and whenever any octave is active — none
-  of that is modeled, so e.g. an Advent feria currently still shows all
-  five suffrages when the real office would have none.
+- Suffrage omission (`lauds.ts`'s `suffrages` case) now checks: Double-or-
+  higher rank, Christ the King, Advent/Christmastide/Passiontide season,
+  any active octave (however low its own rank), Marian Saturday's own
+  Cross/BVM filter, and the Cross-only ferial-office check — all
+  confirmed directly against **Monastic Tridentinum 1617** itself, not
+  just the Tridentine 1906/1910 track the suffrage content and the
+  Joseph/Cross-gating logic were sourced from (checked Advent 2026-12-03,
+  Christmastide 2026-12-30, Passiontide 2026-03-23, an active octave via
+  St. Lawrence's own Aug 11-12, and ordinary Lent 2026-02-20 specifically
+  *not* excluded, to confirm it's Passiontide-only, not all of Lent).
+  Still not modeled: the Paschaltide *substitution* (real practice
+  replaces the whole suffrage set with a single alleluia-form "Suffragium
+  Paschale" during Eastertide rather than omitting or showing the
+  ordinary set) — flagged, not built.
 - `data/calendar/temporal-categories.yml`'s season→category reconstruction
   is from general knowledge of the pre-1955 tradition, not independently
   verified against a primary source for every entry (flagged inline where