test(ef): commemoration, transfer, and privilege coverage for the Major Litanies

test_precedence_ef.ml: a privilege_cases row for RG109(f), deliberately
rank Class4 so it cannot pass via the pre-existing "of a I-class day"
branch by accident. Three disposition_cases rows: the two RG80 trigger
shapes (Transfer, not Commemorate) and a synthetic third row proving the
winner-slug guard is specific to the two named trigger days, not "any
I-class winner". Two transfer_target unit tests, both using a pathological
always-blocking occupant to prove no RG96 search runs at all for this
candidate -- a much stronger witness than a cooperative occupant, which
could pass by accident.

test_golden.ml: three new pinned tests through the real data pipeline --
the ordinary case (2026-04-25, matches the oracle's own M5 date), the four
Sunday-displacement years in 2005-2050 (2010, 2021, 2027, 2032, RG111(b)),
and the Easter-Monday transfer shape (2011, complementing the
Easter-Sunday shape already pinned by the existing 1666/2038 Easter-extreme
tests, now widened to include the transfer and its target).

test_rite_ef.ml: the existing "no transfer lands inside the Easter octave"
property gets a named, cited exemption for the Major Litanies (RG80's own
deliberate exception), plus a positive companion test asserting the
exemption is not vacuous (exactly two landings in 2005-2050, both
Easter+2). That companion test was written but never registered in its
own suite list -- caught while mutation-testing the transfer (a mutation
that should have failed it passed silently); fixed by registering it.

Mutation-tested, each of the three parts separately (recorded in the
task's own report): moving the data entity off 25 April fails 7 tests
(golden + oracle only -- zero unit tests, since they build synthetic
candidates); corrupting the transfer's winner-slug guard fails 6 (the two
disposition_cases rows, 3 golden pins, and the newly-registered
transfer-count test); flipping the privilege to Ordinary fails 9
(privilege_cases, the disposition SYNTHETIC row, the oracle's count pin,
5 golden pins, and the exhaustive Validate property sweep).

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