refactor(utils): translate all comments to English and enhance circuit breaker

- Translate all Portuguese comments to English in utility modules
- Enhance circuit-breaker.ts with sliding window failure tracking
- Add factory functions for WhatsApp-specific circuit breakers
  (createPreKeyCircuitBreaker, createConnectionCircuitBreaker, createMessageCircuitBreaker)
- Improve volume threshold support for circuit breaker decisions
- Standardize documentation across all utility files

Files updated:
- structured-logger.ts: English comments
- baileys-logger.ts: English comments
- trace-context.ts: English comments
- prometheus-metrics.ts: English comments
- cache-utils.ts: English comments
- circuit-breaker.ts: Enhanced with sliding window + English comments
- retry-utils.ts: English comments
- baileys-event-stream.ts: English comments
- index.ts: English comments

src/Utils/index.ts

@@ -17,18 +17,18 @@ export * from './process-message'
 export * from './message-retry-manager'
 export * from './browser-utils'
 
-// === Novos Utilitários de Observabilidade e Resiliência ===
+// === Observability and Resilience Utilities ===
 
-// Logging estruturado
+// Structured logging
 export * from './structured-logger'
 export * from './logger-adapter'
 export * from './baileys-logger'
 
-// Observabilidade e rastreamento
+// Observability and tracing
 export * from './trace-context'
 export * from './prometheus-metrics'
 
-// Resiliência e performance
+// Resilience and performance
 export * from './cache-utils'
 export * from './circuit-breaker'
 export * from './retry-utils'