35b68b11f9
golangci-lint's misspell linter fails on master: x402_settle_test.go used
British spellings ("honoured"/"honour"). Switch to US spelling to match the
linter's en_US locale. Introduced by #3676.
Claude-Session: https://claude.ai/code/session_01CmdEY7pYmV5zzwCjNJ4ykL
Co-authored-by: Claude <noreply@anthropic.com>