Remove dead PCIe hardware at array start so correctable AER errors stop burying the syslog

Deployment/host.conf.template

@@ -67,6 +67,7 @@
 #   CERTIFICATE MONITOR     domains checked for SSL expiry
 #   SMART HEALTH            drives to skip in SMART monitoring
 #   ZFS REPORT              pools to exclude from ZFS health report
+#   PCIe AER QUIET          dead PCIe devices removed at array start to stop AER log spam
 #
 #   ── RESOURCE MANAGER ───────────────────────────────────────────────────────────────────────
 #   RESOURCE MANAGER        containers paused/stopped under memory pressure
@@ -510,6 +511,19 @@
         "sda"   # boot USB — SMART not meaningful on flash drives
     )
 
+# ━━━ PCIe AER Quiet ━━━
+# PCI addresses removed from the bus at array start so dead hardware stops spamming
+# correctable AER errors into syslog. Full DDDD:BB:DD.F form — find them with:
+#   grep -o "from [0-9a-f:.]*" /var/log/syslog | sort | uniq -c | sort -rn
+#
+# Only devices bound to vfio-pci or to no driver at all are eligible. Anything with a
+# live driver is refused, so a mistyped address cannot pull an HBA or NIC out from
+# under a running system. Devices claimed by a running VM are refused too.
+# Gated by PCIE_QUIET_ENABLED in master.conf. Empty list = no-op.
+    HOSTN_PCIE_QUIET_DEVICES=(
+        # "0000:03:00.0"
+    )
+
 # ━━━ ZFS Report ━━━
     HOSTN_ZFS_REPORT_IGNORE_POOLS=(
         # "disk5"