Add security-model discoverability pointer to the project-wide CloudStack threat model

AGENTS.md

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+<!-- SPDX-License-Identifier: Apache-2.0 -->
+
+# Agent Guide for cloudstack-cloudmonkey
+
+This file is read by automated agents (security scanners, code analyzers,
+AI assistants) operating on this repository.
+
+## Security
+
+Security model: [SECURITY.md](./SECURITY.md)
+
+Agents that scan this repository should consult `SECURITY.md` and the
+project-wide threat model it links before reporting issues.

SECURITY.md

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+<!--
+SPDX-License-Identifier: Apache-2.0
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    https://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+-->
+
+# Security Policy
+
+## Reporting a Vulnerability
+
+`apache/cloudstack-cloudmonkey` follows the [Apache Software Foundation security process](https://www.apache.org/security/).
+Please report suspected vulnerabilities privately to `security@apache.org`; do not
+open public GitHub issues or pull requests for security reports.
+
+## Threat Model
+
+`apache/cloudstack-cloudmonkey` is part of the Apache CloudStack project and is covered by the
+**project-wide CloudStack threat model** rather than a per-repository copy. What the
+project treats as in scope and out of scope, the security properties it provides and
+disclaims, the adversary model, and how findings are triaged are documented in that
+model: <https://github.com/apache/cloudstack/blob/main/THREAT_MODEL.md>.
+
+(That link resolves once the project-wide model lands on `apache/cloudstack`'s
+`main` branch — see apache/cloudstack#13293. A thin `cloudstack-cloudstack-cloudmonkey`-specific
+addendum can be added here later if this component needs one.)