Get security signals across all organizations

Returns threshold-based findings for the last days days: sign-up bursts, unverified and disposable sign-ups, accounts used from many networks, organization, API key, app registration and invitation bursts, new platform admins, model spend spikes, and bot-like use (automation-tool sign-ins, model use around the clock, free allowance used up on day one). Findings are prompts for review, not verdicts.