oracle_ef_test: three structural coverage gaps in the strengthened test

Cheap fixes flagged in review, all confirmed against the committed
snapshot before being applied:

1. An unmapped season phrase skipped the RANK AND COLOUR checks too,
   not just the season comparison -- `continue` in the wrong place.
   Confirmed live: neither Holy Thursday ("maundy"/"holy week" do
   not match the title "Holy Thursday" itself) nor any of the six
   September Ember days (no "ember" case exists at all; the Advent
   and Lent Ember days only ever passed by an incidental substring
   match on "advent"/"lent") had any oracle coverage at all --
   reverting the Holy Thursday colour fix left this test green.
   Season skip and rank/colour checks are now independent.

2. Colour membership alone cannot catch a Rose regression: violet is
   a member of every rose/violet pair by construction (Gaudete/
   Laetare), so "got violet, want one of [rose violet]" passed even
   with RG 131's Rose support removed entirely. On the day the pair
   actually names (oracle rank 1, the Sunday itself, not a weekday
   reusing its propers), a colour set containing rose now demands
   rose specifically.

3. `has("sexagesima")` never matched missalemeum's own ligatured
   "Sexagesimæ" -- confirmed in the committed snapshot: the ligatured
   form appears 10 times, the unligatured form only 4, and every
   ligatured instance mapped to season "" (skipped from ALL coverage,
   not merely a season miss, given finding 1 above). Normalised once,
   generally (æ -> ae), not as a single hardcoded word, so any other
   ligature this generator's own data may carry is covered too.

Net effect on TestOracleEF: 730 checked (up from 691), 29 skipped
(down from 39) -- the 10 reclaimed by fix 3. Still green: 0
unallow-listed rank or colour mismatches over the full snapshot.

0 files changed, 0 insertions, 0 deletions