Mail Gateway rows now expand inline to show the detail the slim
ResourcePMGMeta projection couldn't carry: every cluster node with
status / role / uptime / loadavg / postfix queue (active/deferred/
hold/incoming counts + oldest message age), quarantine breakdown
(spam / virus / attachment / blacklisted), spam-score distribution,
top 8 domains by mail volume, and the mail-flow detail strip
(bounces in/out, greylist, junk, RBL + pregreet rejects, bytes
in/out, average process time).
Drawer fetches /api/pmg/instances?id=<id> on first open so the row
keeps its slim payload; the new endpoint projects
Monitor.GetState().PMGInstances directly under ScopeMonitoringRead
with optional id / name filters.
Same inline expand-row pattern as the ceph and workloads drawers
(TableRow inserted below, colspan all columns).
rcourtman