As a developer, SRE, or architect working with ARO HCP, I want comprehensive documentation explaining how Azure authentication works from start to finish in the managed Azure control plane, so that I can understand the system.

Acceptance Criteria

• Documentation includes explanation of identity types used (managed identities, workload identity)
• Documentation explains SecretProviderClass configuration
• Documentation covers KeyVault integration and secret structure
• Documentation includes authentication flow diagrams
• Documentation explains pod volume mounts for credentials
• Documentation covers HostedCluster identity configuration