Michael Freno
3ad030a412
- Implement CircuitBreaker class with CLOSED/OPEN/HALF_OPEN states - Configurable failure threshold, success threshold, and timeout - Fallback behavior when circuit opens (returns neutral 0.5 score) - State change callbacks for monitoring and logging - Comprehensive metrics tracking (executions, failures, successes, timestamps) - Update SpamShieldService to use circuit breakers for both Hiya and Truecaller - Add parallel API calls with graceful degradation - Export circuit breaker types and service interfaces - 32 unit tests covering circuit transitions, fallback, and service integration Co-Authored-By: Paperclip <noreply@paperclip.ing>