feat(V2): URL exchange configurabili da .env (DERIBIT_URL_*, BYBIT_URL_*, ecc.)

src/cerbero_mcp/exchanges/alpaca/client.py

@@ -92,6 +92,7 @@ class AlpacaClient:
         api_key: str,
         secret_key: str,
         paper: bool = True,
+        base_url: str | None = None,
         trading: Any | None = None,
         stock_data: Any | None = None,
         crypto_data: Any | None = None,
@@ -100,9 +101,18 @@ class AlpacaClient:
         self.api_key = api_key
         self.secret_key = secret_key
         self.paper = paper
-        self._trading = trading or TradingClient(
-            api_key=api_key, secret_key=secret_key, paper=paper
-        )
+        self.base_url = base_url
+        # alpaca-py TradingClient accetta `url_override` per override URL trading.
+        # Data clients (Stock/Crypto/Option) non supportano url_override sul costruttore;
+        # usano endpoint dati separati (data.alpaca.markets) — `base_url` è ignorato per essi.
+        if trading is None:
+            trading_kwargs: dict[str, Any] = {
+                "api_key": api_key, "secret_key": secret_key, "paper": paper,
+            }
+            if base_url:
+                trading_kwargs["url_override"] = base_url
+            trading = TradingClient(**trading_kwargs)
+        self._trading = trading
         self._stock = stock_data or StockHistoricalDataClient(
             api_key=api_key, secret_key=secret_key
         )