Add 4 more fixed Lord's/BVM feasts, and fix Our Lady of the Snows' Nocturn 3

Finding of the Holy Cross (May 3), the Transfiguration (Aug 6), the
Exaltation of the Holy Cross (Sep 14), and Dedication of the Basilica of
the Most Holy Savior (Nov 9, the Lateran) were all excluded under the
same stale "fixed feast of the Lord, not modeled" note that turned out
wrong for Our Lady of the Snows. All four have real, complete content in
the reference engine. Presentation of the BVM (Nov 21) was excluded
under the equivalent "fixed BVM feast" note and is added the same way.

- finding-of-the-holy-cross: fully proprium, own collect/antiphon/Matins
  throughout; now correctly outranks
  ss-alexander-eventius-theodulus-and-juvenal, matching what that
  saint's own file already documented as the live reality.
- transfiguration: same proprium shape. Its subordinate saints (Ss.
  Xystus/Felicissimus/Agapitus) stay excluded -- blocked by the real,
  separate octave/subordination-rendering gap, not by an unmodeled
  Transfiguration.
- exaltation-of-the-holy-cross: reuses the Finding of the Holy Cross's
  content wholesale (ex Sancti/05-03) -- collect/antiphon via a cross-id
  `propers` pointer, Matins nocturn-readings duplicated (no cross-id
  lookup exists for that mechanism).
- dedication-of-the-basilica-of-the-most-holy-savior: reuses the
  existing Common-of-a-Dedication (collect-c8, benedictus-antiphon-
  common-of-a-dedication), real unique Nocturn 2 vita of her own. Her
  secondary, St. Theodore, stays excluded for the same
  octave/subordination reason as above.
- presentation-of-the-bvm: real unique collect of her own; her
  Benedictus antiphon is a substituted Common reference
  (truncate-and-add-alleluia edit specific to this feast), authored as
  her own file.

Also: our-lady-of-the-snows.yml was missing its own Nocturn 3 (she
defers to Commune/C11's own Gospel-incipit-plus-Bede-homily, same as
Presentation of the BVM) -- added.

Test updates (not regressions): three tests had fixed proof dates
colliding with the newly-added feasts, updated to reflect the new,
correct behavior. npm test (365 tests) and tsc --noEmit both pass.

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

TODO.md

@@ -42,13 +42,18 @@ across every hour and content type in this app.
    - The bulk Vulgate (Latin) + Douay-Rheims (English) scripture import into
      `src/data/scripture/` — long-term project, explicitly deferred; Matins scripture
      citations resolve to `missing` text until it lands.
-   - A handful of individually-flagged content gaps, each already flagged in place rather than
-     silently dropped: St. Frances of Rome's and St. Bibiana's Benedictus antiphons
-     (structurally can't win their own day under this app's calendar in any near-term year,
-     needs a very late test year to check); Ss. Ursula and Companions' Benedictus antiphon
-     (a category-of-one, no live rendering to verify against); the four "…benedícta…"
-     octave-day Ant+V/R+collect blocks (not yet modeled). "Our Lady of the Snows" — formerly
-     listed here as "not modeled at all" — is now added; see "Our Lady of the Snows added"
+   - The four "…benedícta…" octave-day Ant+V/R+collect blocks (Christmas Octave's own
+     Nativity/Stephen/John/Holy-Innocents commemorations, e.g. on Dec 30) — not yet modeled;
+     see "Octave content" below for the real mechanism gap this needs. St. Frances of Rome's/
+     St. Bibiana's Benedictus antiphons and Ss. Ursula and Companions' were also once flagged
+     here — the first two turned out already resolved (verified live, see memory
+     `vu-todo-priority`'s own correction note), the third is a settled non-gap (no unique text
+     exists to author, see her own file's comment) — not carried forward as open items.
+     Five "fixed Lord's/BVM feast, not modeled" exclusions across the calendar (Our Lady of the
+     Snows, the Finding of the Holy Cross, the Transfiguration, the Exaltation of the Holy
+     Cross, the Dedication of the Lateran, the Presentation of the BVM) turned out to be the
+     same stale mistake repeated six times — all six now added with real content; see "Our
+     Lady of the Snows added" and "Four more 'not modeled' fixed Lord's/BVM feasts added"
      below.
 
 3. **Known, deliberate simplifications** — flagged as intentional, not a bug, no plan to
@@ -1651,6 +1656,71 @@ Live-checked via direct resolution (not a browser query, per
 Benedictus antiphon, day collect, and Matins reading all resolving `verified`. `npm test` (365
 tests) and `tsc --noEmit` both pass.
 
+### Four more "not modeled" fixed Lord's/BVM feasts added (2026-08)
+
+Per direct instruction ("import the sanctoral content that exists" — this app isn't
+reconstructing any one calendar, and content beyond what the user's own final calendar keeps is
+still worth having so others can build their own): swept every remaining "fixed Lord's/BVM
+feast, not modeled" exclusion in `sanctoral-calendar.yml` the same way Our Lady of the Snows was
+just fixed, rather than treating that as a one-off. All four turned out to have real, complete
+source content too:
+
+- **Finding of the Holy Cross** (May 3, Duplex II Classis) — her `[Rule]` is `proprium`: fully
+  own text throughout (collect, antiphon, Nocturn 2/3). Now wins outright over
+  `ss-alexander-eventius-theodulus-and-juvenal`, exactly matching what that saint's own file
+  already documented as the live-verified reality ("loses the day to the Finding of the Holy
+  Cross... this isn't just an artifact of the specific year checked") — her file had simply
+  never been given a real competitor to lose to until now.
+- **The Transfiguration of Our Lord** (Aug 6, Duplex II Classis) — same `proprium` shape, fully
+  own text throughout. Its three subordinate saints (Ss. Xystus/Felicissimus/Agapitus) are
+  still excluded — no longer because the Transfiguration itself is unmodeled, but because of
+  the same real, separate octave/subordination-rendering gap that already blocks St. Clare et
+  al.
+- **The Exaltation of the Holy Cross** (Sep 14, Duplex Majus) — her `[Rule]` is
+  `ex Sancti/05-03`: reuses the Finding of the Holy Cross's content wholesale. Collect/antiphon
+  reuse via a cross-id `propers` pointer (`propers: finding-of-the-holy-cross`, same pattern as
+  `st-michael.yml`'s `apparition-of-st-michael`) rather than duplicate files; the Matins
+  nocturn-readings mechanism has no equivalent cross-id lookup (`getNocturnReadings` keys
+  strictly off the saint's own id), so `exaltation-of-the-holy-cross.yml` duplicates
+  `finding-of-the-holy-cross.yml`'s reading content instead.
+- **Dedication of the Basilica of the Most Holy Savior** (Nov 9, i.e. the Lateran, Duplex II
+  Classis) — her `[Rule]` is `ex C8` (Common of the Dedication of a Church, already modeled —
+  `collect-c8.yml`/`benedictus-antiphon-common-of-a-dedication.yml` already existed from
+  `dedication-of-the-basilicas-of-ss-peter-and-paul.yml`, reused directly here, not duplicated),
+  but real unique `Lectio1-6(+6a)` vita content of her own. Her secondary, St. Theodore, is
+  still excluded — same real octave/subordination gap as the Transfiguration's secondaries
+  above (her own embedded `[Commemoratio 5]` block already carries his real collect too, ready
+  to use once that mechanism exists).
+- **The Presentation of the BVM** (Nov 21, Duplex Majus, itself a Monastic-1617-only addition)
+  — has a real, unique `[Oratio]` of her own (unlike Our Lady of the Snows), but her
+  `[Ant 1]` is a *substituted* Common reference (`@Commune/C10:Ant 2_`, with a
+  feast-specific `s/Christo:.*/Christo, allelúja./` truncation applied and computed by hand,
+  not shared verbatim by any other saint) — authored as her own file via `propers`, same
+  "substitution makes shared-formula text effectively proper" reasoning as
+  `st-lucy-collect.yml`.
+
+**Correction to Our Lady of the Snows found during this same sweep**: her own file had no
+Lectio7-9 either, and — like the Presentation of the BVM — this means she defers to
+Commune/C11's own Nocturn 3 (a bare Gospel incipit, Luke 11:27-28, plus the Venerable Bede's
+homily). Missed in the first pass (only her Nocturn 2 vita was authored); added now, identical
+content to `presentation-of-the-bvm.yml`'s own Nocturn 3, duplicated for the same
+no-cross-id-lookup reason as Exaltation/Finding of the Holy Cross above.
+
+**One real bug caught before committing**: Finding of the Holy Cross's own collect/antiphon
+files were never actually created in the first draft (only Exaltation's cross-id pointer to
+them was written) — both resolved `missing` on live verification. Caught by re-checking every
+new feast end-to-end via direct resolution before committing, not assumed correct from the
+file list alone; fixed immediately, re-verified.
+
+**Test updates, not regressions**: three tests had fixed proof dates that happen to collide
+with the newly-added feasts, all updated to reflect the new, correct behavior rather than the
+old absence: `tests/calendar/may-sanctoral.test.ts` (Finding of the Holy Cross now correctly
+outranks its stub competitor instead of winning by the stub's own default), and
+`tests/calendar/day-label.test.ts` (two dates — Nov 9 and 1943-11-21 — now show the new saint's
+name instead of a ferial fallback label, the latter because Duplex Majus already meets this
+app's own pre-existing privileged-Sunday rank threshold in `commemorations.ts`, not new
+behavior). `npm test` (365 tests) and `tsc --noEmit` both pass.
+
 ### Bible-plan TSV — bulk conversion done (2026-08)
 
 All ~369 non-blank rows of the user's own bible-plan TSV (`~/Downloads/bible-plan.tsv`, 390