The LDAP sync enabled, disabled and detached clients one at a time. Each
per-client call locked the inbound and pushed to its node under that lock
with a 4s timeout, so users sharing an inbound on a node that answers its
status probe but hangs on client writes queued one push timeout apiece:
five users took 20s in the test, and hundreds of directory users behind a
hung node stretched one run over hours. Each changed email was also queued
once per configured tag, repeating a no-op lookup for every extra tag.
Enable and disable now go through BulkSetEnable, and the cleanup through
one BulkDetach per inbound: each inbound is locked, written and pushed
once, and its push stops at the first failure for the reconcile to finish.
The same five users now cost a single push timeout.
Sanaei
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