Accepts a batch of mutating or security-relevant audit events observed by the gateway (tool invocations, logins, tool publishing) and forwards each into the tenant's audit stream. Pool-token accessible -- called by the gateway itself, not by end users.
Gateway-generated UUIDv4 -- idempotency key.
Free-form -- not restricted to a fixed set. Common values today are tool.invoke, user.login, admin.login and tools.publish, but the gateway may report other event types mcp-manager does not yet know about; those are still forwarded into the audit stream rather than rejected.
Batch accepted; individual malformed events may be dropped (accepted < total).
Malformed envelope