Function evaluate_policies 

pub async fn evaluate_policies<CTX: Send + Sync + Clone + 'static, Client: FHIRClient<CTX, OperationOutcomeError> + Send + Sync + 'static>(
    context: PolicyContext<CTX, Client>,
    policies: &Vec<Arc<AccessPolicyV2>>,
) -> Result<PolicyContext<CTX, Client>, OperationOutcomeError>

Evaluates a list of access policies and returns the updated policy context when access is granted.

Policies are evaluated in order. The first policy returning PermissionLevel::Allow grants access.

Errors

Returns OperationOutcomeError when:

• no policy grants access,
• the evaluated policy returns an evaluation error,
• the policy context cannot be recovered after granting access.