docs(DATAGO-115627): update installation and RBAC guides with secure-by-default authorization details

[cyrus2281]

What is the purpose of this change?

This change implements secure-by-default authorization for Agent Mesh Enterprise by updating documentation to reflect that all access is denied unless explicitly configured. The update explains the security model and provides clear guidance on configuring proper authorization for both development and production environments.

How is this accomplished?

• docs(installation, rbac): update installation and RBAC guides with secure-by-default authorization details
  • Added clear warnings about secure-by-default behavior in installation guide
  • Updated RBAC documentation to explain authorization types (deny_all, default_rbac, custom, none)
  • Added development mode examples with proper security warnings
  • Clarified production security requirements throughout documentation

Anything reviews should focus on/be aware of?

Ensure security warnings are appropriately prominent and that the development-only configurations are clearly marked as unsuitable for production use.

[cyrus2281]

Must be merged after https://github.com/SolaceDev/solace-agent-mesh-enterprise/pull/319

[sonarqube-solacecloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

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