Unify runtime morphology on pkg/cmdutil.Morph (same function the generator uses),
add a SemanticAliasHandler that looks up the embedded generated table after
morphological normalization and rewrites synonyms to the command's canonical flag
(leaving blocked/ambiguous synonyms untouched for the did-you-mean path), and
thread the command CLIPath through the pipeline Context. Pilot the mechanism on
'calendar event list' by removing its hand-written hidden spelling variants; a
behaviour-preservation test locks the outcome.
