docs: update README cyber verification guidance (#484)

README.md

@@ -1,5 +1,5 @@
 > [!NOTE]
-> **[Shannon 3.0 is live](https://github.com/KeygraphHQ/shannon/discussions/439):** deeper security code analysis, more thoroughly vetted findings, a rebuilt CLI, native CI/CD, professional PDF reports, and SARIF.
+> **[Cyber verification for Anthropic and OpenAI models](https://github.com/KeygraphHQ/shannon/discussions/483):** complete your provider's cyber verification program to prevent model failures and refusals during cyber workloads.
 
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@@ -132,7 +132,7 @@ These reports are from Shannon Open Source scans of Photoview 2.4.0, one of the
 - **Docker**: required for the worker container.
 - **Node.js 18+**: required for the recommended `npx` workflow.
 - **AI provider credentials**: Shannon runs on Anthropic, OpenAI, xAI, AWS Bedrock, and [any other provider](docs/ai-providers.md#any-other-provider) in the harness catalogue — each of which you can point at a proxy or LLM gateway through a [custom base URL](docs/ai-providers.md#custom-base-url), and a model the catalogue does not carry can be described with a [custom model configuration](docs/ai-providers.md#custom-model-configuration). You bring your own key, and Keygraph never proxies your model traffic. Shannon is provider-agnostic. See [AI providers](docs/ai-providers.md#suggested-models) for suggested model IDs.
-- **Cyber safeguards cleared with your provider**: Anthropic and OpenAI apply real-time safeguards to cyber-security workloads, which can interrupt a scan mid-run. Complete their guidance for legitimate security testers before your first run - see [AI providers](docs/ai-providers.md#cyber-safeguards-do-this-before-your-first-scan).
+- **Cyber safeguards cleared with your provider**: Anthropic and OpenAI apply real-time safeguards to cyber-security workloads, which can interrupt a scan mid-run. Complete their guidance for legitimate security testers before your first run - see [AI providers](docs/ai-providers.md#cyber-safeguards-do-this-before-your-first-scan) and the [cyber verification announcement](https://github.com/KeygraphHQ/shannon/discussions/483).