refactor(cirkel): remove the legacy circle auto-migration (no auto-fediverse)
autoMigrateCircles auto-sent Follows on boot to re-establish legacy circle_links
as AP follows. That violates the rule 'the code never throws anything into the
fediverse automatically' — at scale it would surprise-Follow on behalf of operators
who never asked. Removed the boot call, the function, its export, and the manual
scripts/migrate-circles.mjs (bulk Follows). resolveApActor stays (used by bare-domain
follows). Dead circle_links table is left as harmless dead data; an operator restores
an old cirkel by re-following in /volgend (their own click). We can do this clean
removal now precisely because we're still small-scale.
Co-Authored-By: Claude <noreply@…>