The sync command's exportToJSONL function was not filtering wisps,
causing them to be re-added to JSONL during bd sync re-export step.
autoflush.go had wisp filtering but sync_export.go did not. Added
the same filtering logic to prevent wisps from being exported to JSONL.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>