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krishicks
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When the gateway refuses a caller that has already authenticated, it now emits an OCSF API Activity event. The caller gets exactly the same error as before. The event records: - Who: the principal (user, mTLS operator, sandbox, or gateway peer). - What: the gRPC method, plus the sandbox or workspace that was refused when there is one. - Why: a reason such as cross_sandbox, missing_role or not_workspace_member. - Correlation: the caller's address and request ID, the same fields the authentication events carry. That covers the denials made centrally by the router and the shared guards, plus the checks inside handlers that have no shared guard: a sandbox naming another sandbox (in either sandbox-name resolver), a non-user caller refused by mutation admission, a sandbox sending a config update it isn't allowed to, and a non-admin granting the workspace admin role. Denials raised in the mutation admission worker, which runs in a spawned task, keep the request's context. When a sandbox credential is refused for calling a method it may not call, touching another sandbox, or acting across workspaces, the gateway also emits a High-severity Detection Finding. It carries the same correlation_uid as the denial event. A real supervisor never makes these requests, so a finding means the credential is probably being misused. Two cases are recorded without a finding: a method the gateway doesn't recognize (unknown_method), so a newer supervisor doesn't look like a compromised one, and a supervisor whose own sandbox was deleted mid-request, which is refused but isn't misuse. The shorthand line names the refused sandbox or workspace, for example sandbox:<id>, so operators reading console logs can see the target without JSONL or OTLP export. To support this, the OCSF crate's Actor can now hold a user instead of a process, and the API Activity builder gained the fields gateway events need. Supervisor inference events come out unchanged. Gateway events declare the container profile only when they concern a sandbox, as MXC findings do. The OCSF 1.8.0 resource_details schema is vendored so the refused sandbox or workspace goes in the standard resources field. Refs #2912 Signed-off-by: Kris Hicks <khicks@nvidia.com>