Added @UseGuards(AuthGuard) and rate limiting (@Throttle) to /api/v1/federation/identity/verify endpoint. Configured strict rate limit (10 req/min) to prevent abuse of this previously public endpoint. Added test to verify guards are applied. Security improvement: Prevents unauthorized access and rate limit abuse of identity verification endpoint. Fixes #290 Co-Authored-By: Claude Sonnet 4.5 <[email protected]>