Mint, resolve, list and revoke, with the effective role capped at the
owner's and recomputed per request rather than frozen at creation.
Deleting a user deletes their tokens in the same call, so offboarding is
one action. Revoking somebody else's token answers not-found rather than
forbidden, since a 403 confirms the credential exists.
Also re-exports shared.APITokenMaxDays into server/internal/models,
following the existing ValidRole wrapper pattern, since the token
service needs it and it was never re-exported.
mrhid6
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