Merge branch 'fix/ef-precedence-defects': seven EF calendar defects

Fixes seven defects in the EF calendar, each found by differential and
oracle comparison against an independently-written engine and each
backed by a cited paragraph of the Rubricae Generales verified against
the 1962 Missal:

  RG 96  transfers must skip II-class days (the Precious Blood was
         landing on the Visitation)
  RG 91  a II-class privileged feria yields to an equal-class feast
         (St Matthew was losing to the September Ember Wednesday)
  RG 11  all Sundays of Advent, Lent and Passiontide are I class
         (only Advent I was), which also settles St Joseph on a Lent
         Sunday
  RG 131 Rose on Gaudete and Laetare, which the EF path never emitted
  RG 122 Holy Thursday is white

and the sanctoral generator itself, whose rank inference had tagged 15
III-class feasts as commemorations, dropped four entries to slug
collisions, and mis-tagged three class fields.

The EF oracle test asserted Season only, which is why none of this ever
failed. It now asserts rank and colour, with a cited allow-list.

Two commemorations had been deleted on a primary-source claim the
primary source contradicts: the Archivum Liturgicum transcription
silently drops commemoration lines where the photographic scans carry
them. Six of the seven affected dates are now present; the seventh
(25 December) is blocked by an ingestion limit that reads only the
first of three Christmas Masses, recorded at its cause.

Known gap, recorded in source: RG 95/97/98 chained transfers, where two
I-class feasts translate to the same day.

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