data(ef): sanctoral audit — one genuine gap, 21 wrong colours (RG124)

Full re-extraction of the primary CALENDARIUM (both photographic scans,
missale-romanum-1962.pdf and Missale Romanum 1962_text.pdf, rendered page
images read directly rather than trusting either PDF's own OCR text
layer) against all 327 base sanctoral entries plus the two prior overlay
Adds. Both scans agree throughout; no OCR ambiguity required adjudication
this round.

Add `barbara` (4 December): both scans carry a Commemoratio nested under
Peter Chrysologus's own entry, absent from data/ef/sanctoral.sexp AND
from lectio's own tridentine-calendar.ini (confirmed directly) — the same
upstream-gap shape as the five entries the ef-rebootstrap task already
added (agnes-secundo/boniface-martyr/eusebius-confessor/evaristus/
theodore).

Correct 21 sanctoral colours against RG 124 ("De coloribus paramentorum"),
scan-verified word for word: 124(b) red for an Apostle/Evangelist's own
feast day except John's (27 December, already correct); 124(e) red for a
Martyr's own martyrdom; RG 117's five-colour residual otherwise white.
Every one of the 21 is a confirmed lectio/missalemeum bootstrap defect —
checked individually against lectio's own ini, several of whose Polish
name fields already contradict that same record's own colour tag (e.g.
`martha`: "Dziewicy", Virgin, no "Męczennicy", yet `colour = red`) — the
identical root cause and mechanism the `eusebius-confessor` fix already
established. Colour is confirmed read nowhere in Precedence_ef's
resolution logic (grep), so these are output-correctness fixes with zero
observed-office blast radius; three (apollinaris/josaphat/chair-of-st-
peter) additionally disagree with missalemeum's own oracle, not only with
lectio, so they are adjudicated from RG 124's text directly rather than
by which engine happens to agree.

Both corrections applied via data/ef/adjustments.sexp's established
Overlay mechanism (data/ef/sanctoral.sexp stays generated, untouched).

Pinned: test_rite_ef.ml (two new tests, verified to fail against the
pre-fix data); test_differential.ml's new C18 predicate (526 rows,
2005-2050) and test_oracle.ml's new M21/M22 predicates (20 + 2 rows,
2026-2027), each with data/ef/expected-divergences{,-missalemeum}.sexp
entries citing RG124 or the matching upstream-gap precedent;
test_golden.ml's 1902-02-22 pin corrected (chair-of-st-peter was white in
the stale pin, RG124(b) makes it red). All 329 tests green, including the
full 1583-9999 exhaustive sweep.

Full method, per-entry adjudication table and corrected bucket counts:
docs/research/rules-register.md (gitignored) and
.superpowers/sdd/2026-08-12-colitur-rg16a/sanctoral-audit-report.md
(gitignored).

1 files changed, 22 insertions, 0 deletions

diff --git a/test/test_differential.ml b/test/test_differential.ml
index 5093484..a4e550d 100644
--- a/test/test_differential.ml
+++ b/test/test_differential.ml
@@ -465,6 +465,27 @@ let jan_6_13_slug slug =
 let nativity_octave_day_slugs =
   [ "ef-nativity-octave-day-5"; "ef-nativity-octave-day-6"; "ef-nativity-octave-day-7" ]
 
+(* C18 (ef-sanctoral-audit, 2026-08-14): the closed set of colitur
+   [status = Feast] sanctoral slugs whose bootstrapped [colour] was
+   corrected against RG 124 (data/ef/adjustments.sexp's own audit-block
+   comment has the full citation and per-slug reasoning); every one of
+   these still carries lectio's OLD, uncorrected colour, so a row where
+   this is the ONLY colitur candidate observed for its own date diffs on
+   [Colour_f] alone whenever it wins the day (most years -- these are all
+   ordinary universal feasts, rarely impeded). Deliberately a literal list,
+   not a shape predicate, the same discipline C6/C14/C15/C16 already use:
+   a colour diff on any OTHER slug must still surface as unexplained. Eight
+   further audit corrections (prisca/peter/vitus/margaret/agapitus/liborii/
+   mark-i, all Commemoration_only, plus the new `barbara` Add) are NOT
+   listed here and need no predicate: [colitur_rows_2005_2050] emits only
+   the OBSERVED day's own record, and a [Commemoration_only] candidate can
+   never be observed (Precedence.resolve's own design), so their corrected
+   colours have no row in this comparison to explain. *)
+let audit_colour_corrected_slugs =
+  [ "conversion-of-st-paul"; "chair-of-st-peter"; "john-of-san-fecundo"; "ephrem-of-syria";
+    "julia-of-falconieri"; "john-gualbert"; "camillus-de-lellis"; "jerome-emiliani"; "apollinaris";
+    "martha"; "alphonsus-liguori"; "augustine"; "rose-of-lima"; "josaphat" ]
+
 (* C14 (ef-rebootstrap fixture refresh, 2026-08-12; replaces the closed C9,
    see data/ef/expected-divergences.sexp's own C14 note for the full RG
    citation): the exact 3 civil days, across the whole 2005-2050 window,
@@ -620,6 +641,7 @@ let layer_c_reason (l : row) (c : row) diffs =
     && String.equal c.slug "ef-holy-name"
   then Some "C16"
   else if is_bvm_saturday_row c diffs then Some "C17"
+  else if diffs = [ Colour_f ] && List.mem c.slug audit_colour_corrected_slugs then Some "C18"
   else None
 
 (* ---------------------------------------------------------------------- *)