test(differential): allow-list C12 for the 15-entry rank correction

Re-bootstrapping sanctoral.sexp (previous commit) makes 7 of the 15
newly-corrected III-class feasts win an occurrence they previously lost as
Commemoration_only: RG 91 entry 24 (a universal III-class feast) outranks
entry 28 (a IV-class feria), and the occurrence code that resolves this
already existed and needed no change. lectio's own committed differential
fixture (test/fixtures/lectio-ef-2005-2050.txt) is a frozen snapshot
predating lectio's own equivalent generator fix, so it still shows the
class-4 feria observed with the same saint only as a trailing
commemoration -- a new, expected divergence from that fixture, 14 rows in
the 2005-2050 window.

expected_rows (14) is independently re-derived by grepping the regenerated
sanctoral.sexp's own post-regeneration civil-day output against the
committed lectio fixture directly (two flat-file extractions cross-checked
against each other), not transcribed from the comparator's own failing-test
output.

C12 reuses an id last used, and removed, by the RG16(a) task's own reverted
Purification retag -- noted at both the old and new entries' own comments
so the id's history is visible to a future reader.

1 files changed, 5 insertions, 0 deletions

diff --git a/data/ef/expected-divergences.sexp b/data/ef/expected-divergences.sexp
index c8d863d..373827a 100644
--- a/data/ef/expected-divergences.sexp
+++ b/data/ef/expected-divergences.sexp
@@ -72,3 +72,8 @@
  (verdict colitur)
  (note "Holy Thursday (\"ef-passiontide-2-thursday\") is white in colitur, per RG 128(b)'s explicit exception -- independently confirmed by the missalemeum oracle (Task 16 report), whose colour set for that day is white alone, unlike the surrounding Triduum days which include violet as an option. lectio has no such exception and prints Passiontide's base violet straight through Holy Thursday. Found via Task 16's oracle comparison, not the original lectio differential (lectio's own colour did not previously disagree, because colitur's own bug matched it) -- fixed in colitur, so this row records a NEW divergence from lectio's still-uncorrected violet, not a pre-existing one.")
  (expected_rows 46))
+ ((id C12)
+ (citation "RG 91 entry 24 (\"Festa III classis, in calendario Ecclesiae universae inscripta\") outranks entry 28 (\"feriae IV classis\") -- register §4's own Table of Precedence, unchanged by this task; only the underlying DATA changed, ef-rebootstrap (2026-08-12): 15 entries in data/ef/sanctoral.sexp were wrongly bootstrapped `rank = commemoration` (RG 91 gives a bare commemoration no table row at all, register §6.1) where the 1962 calendarium's own text gives each a class number instead -- primary-source-verified, all 15 falling 6 March-5 April (benedict 21 Mar, cyril-of-jerusalem 18 Mar, forty-holy-martyrs-of-sebaste 10 Mar, frances-rome 9 Mar, francis-of-paola 2 Apr, gabriel-the-archangel 24 Mar, gregory-the-great 12 Mar, isidore-of-seville 4 Apr, john-damascene 27 Mar, john-of-capistrano 28 Mar, john-of-god 8 Mar, patrick 17 Mar, sts-felicitas-perpetua 6 Mar, thomas-aquinas 7 Mar, vincent-ferrer 5 Apr). Corrected upstream in lectio's own generator and re-bootstrapped here (source SHA-256 1b303ef2...); the occurrence/precedence code that resolves entry 24 over entry 28 already existed and needed no change.")
+ (verdict colitur)
+ (note "5 of the 15 corrected slugs fall on a date that lands inside a plain class-4 Paschaltide or Septuagesima feria somewhere in 2005-2050 (frances-rome, francis-of-paola, isidore-of-seville, john-of-god, sts-felicitas-perpetua, thomas-aquinas, vincent-ferrer -- 7 unique slugs, 14 rows total, independently re-derived by grepping data/ef/sanctoral.sexp's own post-regeneration output against the committed lectio fixture directly, not by transcribing the comparator's own count): colitur now correctly observes the FEAST itself (e.g. `vincent-ferrer class-3 white`); lectio's fixture (frozen before lectio's own equivalent generator fix) still shows the class-4 feria observed with the SAME saint only as a trailing commemoration (e.g. `ef-easter-2-tuesday class-4 white +vincent-ferrer`) -- confirming the saint was already the correct candidate on both sides, and only the OCCURRENCE RESOLUTION differs, exactly as RG 91's own numeric table (24 < 28) requires. C12 was previously used, briefly, for an unrelated Purification-retag divergence that was reverted in the RG16(a) task (see test_differential.ml's own layer_c_reason comment) -- reused here since that earlier entry no longer exists.")
+ (expected_rows 14))