perf(cmpp): add durable inbound fast path

tools/security/install-security-agent.sh

@@ -13,6 +13,7 @@ usermod -a -G cmpp-security cmpp-api
 install -d -o root -g cmpp-security -m 0770 /run/cmpp-security-agent
 install -d -o root -g cmpp-security -m 0750 /var/lib/cmpp-security-agent
 install -d -o cmpp-api -g cmpp-security -m 0750 "$APP_DIR/logs/api"
+install -d -o cmpp-api -g cmpp-security -m 0750 "$APP_DIR/logs/send-worker"
 [[ -d /var/lib/cmpp-platform/object-storage ]] && chown -R cmpp-api:cmpp-security /var/lib/cmpp-platform/object-storage
 
 sed "s#@CMPP_SECURITY_AGENT_BIN@#$agent_binary#g" "$APP_DIR/deploy/security/cmpp-report-only.conf" >/etc/fail2ban/action.d/cmpp-report-only.conf
@@ -29,6 +30,18 @@ table inet cmpp_security {
   chain input { type filter hook input priority -10; policy accept; ip saddr @blocked_ipv4 drop; ip6 saddr @blocked_ipv6 drop; }
 }
 EOF
+
+install -d -m 0755 /etc/systemd/system/cmpp-send-worker.service.d
+cat >/etc/systemd/system/cmpp-send-worker.service.d/security-boundary.conf <<EOF
+[Service]
+User=cmpp-api
+Group=cmpp-security
+NoNewPrivileges=true
+PrivateTmp=true
+ProtectHome=true
+ProtectSystem=true
+ReadWritePaths=$APP_DIR/logs/send-worker /var/lib/cmpp-platform/object-storage
+EOF
 grep -q 'cmpp-security.nft' /etc/nftables.conf || printf '\ninclude "/etc/nftables.d/cmpp-security.nft"\n' >>/etc/nftables.conf
 nft -c -f /etc/nftables.conf
 nft list table inet cmpp_security >/dev/null 2>&1 || nft -f /etc/nftables.d/cmpp-security.nft
@@ -54,4 +67,4 @@ fail2ban-client -t
 nginx -t
 systemctl daemon-reload
 systemctl enable cmpp-security-agent
-echo "Security boundary installed. Restart cmpp-security-agent and cmpp-api only in the approved release window."
+echo "Security boundary installed. Restart cmpp-security-agent, cmpp-api and cmpp-send-worker only in the approved release window."