✅ Binance (completed previously)

✅ Coinbase Pro (completed in this task)
✅ Kraken (completed in this task)

COBY/connectors/__init__.py

@@ -3,11 +3,17 @@ Exchange connector implementations for the COBY system.
 """
 
 from .base_connector import BaseExchangeConnector
+from .binance_connector import BinanceConnector
+from .coinbase_connector import CoinbaseConnector
+from .kraken_connector import KrakenConnector
 from .connection_manager import ConnectionManager
 from .circuit_breaker import CircuitBreaker
 
 __all__ = [
     'BaseExchangeConnector',
+    'BinanceConnector',
+    'CoinbaseConnector',
+    'KrakenConnector',
     'ConnectionManager', 
     'CircuitBreaker'
 ]