**Plan ref:** Task 6, Milestone 3\n\nAdd `EventOAuthClientCredentials`, `EventOAuthTokenExchange`, `EventOAuthDenied` to `internal/audit/audit_log.go`.\n\n**Files:** `internal/audit/audit_log.go`\n**Gate:** `go build ./...`
Plan ref: Task 6, Milestone 3\n\nAdd
EventOAuthClientCredentials,EventOAuthTokenExchange,EventOAuthDeniedtointernal/audit/audit_log.go.\n\nFiles:internal/audit/audit_log.go\nGate:go build ./...