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, 40 insertions, 0 deletions

diff --git a/internal/caldata/tridentine-calendar.ini b/internal/caldata/tridentine-calendar.ini
index aaa9841..cce1a65 100644
--- a/internal/caldata/tridentine-calendar.ini
+++ b/internal/caldata/tridentine-calendar.ini
@@ -974,6 +974,14 @@ name.en = St. Paulinus of Nola
 reading.first = 2 Cor. 8:9-15
 reading.gospel = Luke 12:32-34
 
+[vigil-of-the-nativity-of-st-john-the-baptist]
+date = 06-23
+rank = class-2
+colour = violet
+name.en = Vigil of the Nativity of St. John the Baptist
+reading.first = Jer 1:4-10
+reading.gospel = Luke 1:5-17
+
 [nativity-of-st-john-the-baptist]
 date = 06-24
 rank = class-1
@@ -998,6 +1006,14 @@ name.en = Sts. John & Paul
 reading.first = Eccli 44:10-15
 reading.gospel = Luke 12:1-8
 
+[vigil-of-sts-peter-paul]
+date = 06-28
+rank = class-2
+colour = violet
+name.en = Vigil of Sts. Peter & Paul
+reading.first = Acts 3:1-10
+reading.gospel = John 21:15-19
+
 [sts-peter-paul]
 date = 06-29
 rank = class-1
@@ -1352,6 +1368,14 @@ rank = commemoration
 colour = red
 name.en = St. Romanus
 
+[vigil-of-st-lawrence]
+date = 08-09
+rank = class-3
+colour = red
+name.en = Vigil of St. Lawrence
+reading.first = Ecclus 51:1-8, 12
+reading.gospel = Matt 16:24-27
+
 [lawrence]
 date = 08-10
 rank = class-2
@@ -1380,6 +1404,14 @@ rank = commemoration
 colour = red
 name.en = Sts. Hippolytus & Cassian
 
+[vigil-of-the-assumption]
+date = 08-14
+rank = class-2
+colour = white
+name.en = Vigil of the Assumption
+reading.first = Sir 24:23-31
+reading.gospel = Luke 11:27-28
+
 [assumption-of-the-blessed-virgin-mary]
 date = 08-15
 rank = class-1
@@ -2289,6 +2321,14 @@ name.en = St. Thomas
 reading.first = Eph 2:19-22
 reading.gospel = John 20:24-29
 
+[vigil-of-christmas]
+date = 12-24
+rank = class-1
+colour = violet
+name.en = Vigil of Christmas
+reading.first = Rom 1:1-6
+reading.gospel = Matt 1:18-21
+
 [stephen]
 date = 12-26
 rank = class-2