Removes LDAP_SERVER_ID/LDAP_REPLICATION_HOSTS as vars an operator has
to hand-set and keep in sync across every site. bootstrap/
site-ldap-register.js (new) asks sso-manager-node's new
GET /api/site/ldap-peers (spoke) or GET /directory-admin/
ldap-replication-config (master) for this node's assigned ServerID +
current peer list, persists it to /config/ldap-replication.env, and
restarts sso-manager only when the computed config actually changed
(OpenLDAP's static slapd.conf is only read at process start). Runs on
every setup.sh invocation -- both master (peer list grows as spokes
join) and spoke.
CFG_LDAP_MMR_MANUAL=true skips the automatic step entirely, for a
topology outside this theta-suite cluster the script can't derive on
its own -- without this escape hatch, an operator's hand-set
LDAP_SERVER_ID/LDAP_REPLICATION_HOSTS would get silently overwritten
on the next run, since every fresh install starts as a master (the
automatic step always runs by default).
Bumps sso-manager-node to pick up the new endpoints + SiteSpoke.ldapServerId.
