fix(of): break the movable-BVM-memorial tie per a CDWDS Notification

Mary, Mother of the Church (Easter+50) and the Immaculate Heart of Mary
(Easter+69) are both movable obligatory memorials that can land on a
FIXED obligatory memorial's own date -- e.g. 2011-06-13 and 2015-06-13,
both against Anthony of Padua. Both candidates banded identically at
Tabula III.10 (100, both universal Memoria_obligatoria), a tie band
could not break, so Precedence.resolve's kernel-level alphabetical
Slug.compare tie-break silently picked instead -- 892 days for Mater
Ecclesiae and 1109 for the Immaculate Heart across 1583-9999, all one
shape (measured against the pre-fix alphabetical order directly, zero
unexplained).

Searched the corpus rather than inventing a rule. colitur's two
previously-checked primary sources really are silent: the 2018 decree
(AAS 110, 437-438) never addresses universal-calendar coincidence, and
Normae n. 14's third clause resolves only two AD-LIBITUM memorials
colliding. A third source resolves it: the CDWDS's own "Notification on
the Memorial of the Blessed Virgin Mary, Mother of the Church" (24 March
2018 -- same dicastery and signatories as the decree; published only on
vatican.va, confirmed absent from the AAS 2018 combined index) states
that when this memorial "coincides with another Memorial of a Saint or
Blessed... the Memorial of the Blessed Virgin Mary is to prevail," and
extends the identical reasoning to the Immaculate Heart of Mary by name.
This is a rubric, not colitur's own reasoned choice.

Implemented as a sub-rank of 95, strictly between Tabula entries 9 and
10 -- the same "fits between neighbours" technique this module already
uses elsewhere -- scoped to the two named slugs rather than
[subject = Bvm], since the Notification's own reasoning is specifically
about a memorial's link to a movable solemnity of the Lord, not a
blanket Marian precedence.

Golden pin updated: test_rite_of.ml's 2011-06-13 tie now pins Mary,
Mother of the Church as observed (was Anthony of Padua, labelled "known
arbitrary"), with the header rewritten to state the outcome now rests on
the Notification, not a coin-flip. The litcal oracle allow-list gains
L10: litcal's own grade vocabulary has no representation for a 95
sub-rank (everything Memoria_obligatoria reads "Memorial"), a
representational gap in litcal, not a computational disagreement -- the
identity axis is untouched and needed no new entry.

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