NOR was absent from iso3-to-iso2, so Norway appeared in no research table:
consumers filter on ISO3_2[iso3], which makes a missing code a silent
omission rather than an error. Its absence is also why SJM -> NO read as
injective -- "NO" had exactly one claimant, the wrong one.
NOR -> NO, from ISO 3166-1, which is what CLDR's codeMappings encodes. The
full CLDR vendor still comes with the 242-country table and will re-derive
this alongside the other 66 missing codes; this is the one line
exp-shepherd needs first to re-key the mislabelled Svalbard rows onto
Norway.
NOR joins the named spot-check, and the completeness floor rises 175 -> 176
with it. Left at 175 that check would have called a regression back to the
pre-NOR map clean, which is the opposite of what it is for. Removing NOR
now fires both guards; injectivity still reports "all 175 codes map to a
DISTINCT ISO2" while it does, for the third time in this defect.
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