feat(ef): the Masses of saints that come from a Common

Nine saints have no proper Mass in the Missal. Its rubric at each one's own
date names a Common -- "Missa Statuit, de Communi Confessoris Pontificis I
loco", "Missa Iustus ... II loco", and so on -- and only the Oratio is proper.
lectio has no Commons concept, so those days resolved no reading at all.

Benedict, Frances of Rome, Gregory the Great, Isidore of Seville, Patrick,
Perpetua & Felicity, Vincent Ferrer, Ubaldus and Didacus.

The readings are written per saint rather than by adding a Commons abstraction.
Each Common resolves to exactly one first/gospel pair for the saint that names
it, so a table plus an assignment layer would buy indirection and nothing else
here; if a future saint needs a Common's OTHER formulary, that is when the
abstraction earns its place.

They go into the generator's missalOverrides table like the rank and colour
corrections, because missalemeum supplies these days with whatever it supplies
them and a regeneration would otherwise leave nine saints mute. The table
learned two new field names to carry them. Four are pinned in
TestTridentineMissalOverrides.

Citations are colitur's, verified there against both photographic scans and
the rendered page images; its data/ef/commons.sexp header records the
three-source method and the per-value evidence.

1 files changed, 9 insertions, 0 deletions

diff --git a/internal/caldata/caldata_test.go b/internal/caldata/caldata_test.go
index 2a13d3d..3de3a2e 100644
--- a/internal/caldata/caldata_test.go
+++ b/internal/caldata/caldata_test.go
@@ -435,6 +435,15 @@ func TestTridentineMissalOverrides(t *testing.T) {
 		{"didacus", "rank", "class-3", "Missal calendarium: S. Didaci Conf., III classis"},
 		{"vigil-of-st-lawrence", "colour", "violet", "RG 128: III-class vigil outside Paschaltide"},
 		{"vigil-of-the-assumption", "colour", "violet", "RG 128: II-class vigil outside Paschaltide"},
+		// Saints whose Mass comes from a Common. The Missal prints no proper
+		// for these; its rubric at each names a Common and only the Oratio is
+		// proper. Without the readings the day resolves nothing at all, so
+		// these are pinned like the rank and colour overrides -- a regeneration
+		// that stopped applying them would leave nine saints mute.
+		{"ubaldus", "reading.first", "Ecclus 44:16-27; 45:3-20", "Common of a Confessor Bishop I"},
+		{"didacus", "reading.first", "1 Cor 4:9-14", "Common of a Confessor not a Bishop II"},
+		{"isidore-of-seville", "reading.first", "2 Tim 4:1-8", "Common of Doctors"},
+		{"benedict", "reading.first", "Ecclus 45:1-6", "Common of Abbots"},
 		// RG 124: red is for Apostles, Evangelists and Martyrs. missalemeum has
 		// these inverted in BOTH directions -- confessors and virgins red, two
 		// actual martyrs white -- which is why both directions are pinned here.