fix(ef): ferias after the Ascension repeat its own Mass, not a Sunday's

Ascension has no octave under the 1960 rubrics -- confirmed structurally:
the Proprium de Tempore's own table of contents runs straight from "In
Ascensione Domini" to "Dominica post Ascensionem" with no per-feria
headings in between. Step 3 of the reading chain therefore fell through
to Preceding_sunday on every unoccupied weekday in that stretch, walking
each one back to the 5th or 6th Sunday after Easter's own citation.

The Missal's own Proprium de Tempore carries an explicit marginal rubric
immediately after the Ascension's Mass propers, before "Dominica post
Ascensionem" begins: "Diebus a feria VI post Ascensionem usque ad feriam
VI ante vigiliam Pentecostes inclusive, dicitur Missa de festo
Ascensionis, cum Gloria et praefatione de Ascensione, sine Credo et
Communicantes proprio" -- every feria without its own proper, from the
Friday after the Ascension through the Friday before the Vigil of
Pentecost, repeats the Ascension's own Mass. RG 490(b) corroborates
independently: it assigns the Ascension preface "tamquam de Tempore"
across that identical window, which only makes sense if the Mass
actually repeated there is the Ascension's, not a numbered Sunday's
(whose own Mass would carry no need for a preface override at all).

Witnessed directly, not only inferred from the rubric: the LMS Ordo
prints "Mass of the Ascension" literally on every affected day across
all three of its fixture windows, in BOTH the tail of Ascension's own
week and the following week -- ruling out the alternative reading (that
the second week instead resumes "Dominica post Ascensionem"'s own Mass,
which a first pass over the FIUV Ordo's own week-labelled titles could
suggest at a glance; its own [praef] field for the same two dates
independently reads "Ascensionis", resolving the apparent conflict).

Implemented as data, not logic, matching this codebase's own established
precedent for the identical RG 299 shape (the week after Trinity Sunday,
data/ef/lectionary.sexp's [trinity_week_entries]): six new hand-authored
entries, [ascension_week_entries] in tools/bootstrap_lectionary.ml,
regenerated against a git-pinned copy of lectio's own source ini (SHA-256
verified unchanged) so the regeneration carries no unrelated drift. The
window's two Saturdays are deliberately excluded -- RG 78's votive Office
of Our Lady on Saturday always wins an otherwise-unoccupied Class4
Saturday first, before step 2 (this fix's own entry point) is ever
reached, so an entry for either slug would be dead data.

Blast radius measured in-process across the full 1583-9999 domain
(throwaway probe, not committed): 16 350 days total across the six
slugs, every one resolved via step 2 (Own_slug), zero anomalies, and the
window's two Saturdays confirmed to contribute zero hits via this cause
across the whole domain, corroborating the RG78-interception reasoning
by direct sweep.

Closed L2 in data/ef/expected-divergences-lms.sexp. New cited entries:
C41 in data/ef/expected-divergences.sexp (95 of 16801 rows, 2005-2050 --
lectio has no equivalent rubric and still walks these ferias back);
M31 in data/ef/expected-divergences-missalemeum.sexp (3 rows in the
2026-2027 window, plus the same shape independently reconfirmed in the
2035 and 2038 live-capture windows) -- missalemeum, Divinum Officium's
lineage, still gives the same wrong answer colitur itself used to give,
which is why these rows used to agree with M18's shape and now escape it
(M18 373 -> 370, the same mechanism M23-M27 established when the
citation axis was first built).

Golden pin: 2031-05-23, the exact date the bug report was filed against.

Mutation-tested: reverting data/ef/lectionary.sexp alone (a git-diff
capture/restore, not a source-code revert, since the fix is data) reddens
19 tests across the differential, both oracle fixtures, all three LMS
Ordo windows, the golden pin, the lectionary unit test and every Render
golden template; restored and reconfirmed green (681 tests; 683 under
COLITUR_EXHAUSTIVE_SWEEP=1, ~175s).

1 files changed, 36 insertions, 2 deletions

diff --git a/test/test_lectionary.ml b/test/test_lectionary.ml
index 7dbb253..59c739d 100644
--- a/test/test_lectionary.ml
+++ b/test/test_lectionary.ml
@@ -115,8 +115,14 @@ let test_ef_data_file_loads () =
          ([epiphanytide_opening_entries], +15); TWO hand-authored
          directly from the Missal, two major movable feasts with
          previously no entry at all ([movable_feast_entries], +2).
-         116 + 1 + 6 + 1 + 2 + 3 + 2 + 15 + 2 = 148. *)
-      Alcotest.(check int) "entry count" 153
+         116 + 1 + 6 + 1 + 2 + 3 + 2 + 15 + 2 = 148.
+         celebrant-rubrics-phase1, Bug 2 (2026-08-22): SIX hand-authored
+         directly from the Missal's own marginal Ascension-repeat rubric
+         ([ascension_week_entries], +6, 153 -> 159) -- see that
+         function's own comment in bootstrap_lectionary.ml for the
+         citation and why the window's two Saturdays are deliberately
+         excluded. *)
+      Alcotest.(check int) "entry count" 159
         (List.length (Lectionary.entries l));
       (match Lectionary.find l (slug "ef-lent-1-monday") with
        | Some [ a; b ] ->
@@ -179,6 +185,34 @@ let test_ef_data_file_loads () =
          scans). *)
       check_entry "ef-corpus-christi" "1 Cor 11:23-29" "John 6:56-59";
       check_entry "ef-sacred-heart" "Eph 3:8-12, 14-19" "John 19:31-37";
+      (* celebrant-rubrics-phase1, Bug 2: the Missal's own marginal rubric
+         after the Ascension's own Mass propers ("Diebus a feria VI post
+         Ascensionem usque ad feriam VI ante vigiliam Pentecostes
+         inclusive, dicitur Missa de festo Ascensionis") repeats the
+         Ascension's own citation on the ferias that would otherwise walk
+         back to the wrong Sunday. Two families pinned (the tail of
+         Ascension's own week; the following week), not merely one, the
+         same "more than one weekday" discipline this file already uses
+         for the Lent Ember pins above. *)
+      check_entry "ef-easter-6-friday" "Acts 1:1-11" "Mark 16:14-20";
+      check_entry "ef-easter-7-monday" "Acts 1:1-11" "Mark 16:14-20";
+      check_entry "ef-easter-7-friday" "Acts 1:1-11" "Mark 16:14-20";
+      (* [ef-easter-6-saturday] keeps its own PRE-EXISTING entry, unchanged
+         by this task -- RG 78's votive Office of Our Lady always wins an
+         otherwise-unoccupied Class4 Saturday first ([readings]' own step
+         ordering runs that branch before step 2 is ever reached), so this
+         table's own value for that slug is dead data on shipped data, but
+         it was already there before this task and touching it is out of
+         scope. [ef-easter-7-saturday] must stay ABSENT instead: that civil
+         day is the Vigil of Pentecost, a NAMED day with its own slug and
+         Mass (temporal_ef.ml's own [named]), so the generic
+         [ef-<season>-<week>-<weekday>] ferial slug this table's new
+         entries key off never gets produced there at all -- an entry
+         would be unreachable data [assert_reachable] would have refused
+         to emit, checked here too as a direct regression net. *)
+      (match Lectionary.find l (slug "ef-easter-7-saturday") with
+      | None -> ()
+      | Some _ -> Alcotest.fail "ef-easter-7-saturday: must stay absent -- the Vigil of Pentecost, named, never a ferial slug");
       check_entry "ef-nativity-vigil" "Rom 1:1-6" "Matt 1:18-21";
       check_entry "ef-pentecost-ember-wed" "Acts 5:12-16" "John 6:44-52.";
       check_entry "ef-pentecost-ember-fri" "Joel 2:23-24; 26-27" "Luke 5:17-26";