feat: complete OF+EF calendar coverage (movable feasts, vigils, ember days, transfers)

Ordinary Form:
- Add the movable Marian memorials that have no fixed date: Mary, Mother of the
  Church (Monday after Pentecost) and the Immaculate Heart (Saturday after the
  Sacred Heart), computed in computeOF.
- General Norms 60: two coinciding obligatory memorials both become optional and
  the ferial is observed -- except Mary, Mother of the Church, which keeps
  precedence per its 2018 decree.

Extraordinary Form:
- Capture fixed-date vigils in the sanctoral harvest (Christmas, the Nativity of
  St John the Baptist, Sts Peter & Paul, St Lawrence, the Assumption, All Saints,
  the Immaculate Conception) -- previously filtered out.
- temporalEF: the movable vigils of the Ascension (I class eve) and Pentecost
  (Whitsun Eve), and the September/Advent Ember days (II class violet ferias).
- transferIfImpededEF: the Annunciation transfers past Holy Week/the Easter
  octave to the Monday after Low Sunday; All Souls moves to Nov 3 when Nov 2 is a
  Sunday.
- genlect harvests proper Masses for the new Ember/vigil days.

Adds TestEFCoverage + TestOFMovableMemorials. Bumps to 0.39.0.

Verified per-day: OF 0 real errors vs calapi (2026-2028, 100% correct-observed);
EF 0 real errors vs missalemeum (2025-2027), residual = deep-tail vigil-occurrence
and St Joseph Passiontide-transfer edges (~1-2 days/yr, documented).

1 files changed, 5 insertions, 1 deletions

diff --git a/scripts/genlect.go b/scripts/genlect.go
index 85ff1c2..6d7a43b 100644
--- a/scripts/genlect.go
+++ b/scripts/genlect.go
@@ -100,7 +100,11 @@ func main() {
 		}
 		slug := day.Observed.Slug
 		isSunday := d.Weekday() == time.Sunday
-		if !isSunday && !properFerial[day.Season] {
+		// Ember and vigil days have a proper Mass even in the green seasons, so
+		// harvest them regardless of season (green ferias otherwise repeat the
+		// preceding Sunday and are skipped).
+		special := strings.Contains(slug, "ember") || strings.Contains(slug, "vigil")
+		if !isSunday && !properFerial[day.Season] && !special {
 			continue // green-season feria -> repeats the Sunday
 		}
 		if seen[slug] {