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

src/cerbero_mcp/exchanges/bybit/client.py

@@ -30,15 +30,24 @@ class BybitClient:
         api_secret: str,
         testnet: bool = True,
         http: Any | None = None,
+        base_url: str | None = None,
     ) -> None:
         self.api_key = api_key
         self.api_secret = api_secret
         self.testnet = testnet
-        self._http = http or HTTP(
-            api_key=api_key,
-            api_secret=api_secret,
-            testnet=testnet,
-        )
+        # pybit HTTP non accetta `endpoint` come kwarg (vedi _V5HTTPManager.__init__:
+        # solo `domain`/`tld`/`testnet`). Override URL applicato post-init
+        # sovrascrivendo l'attributo `endpoint` dell'istanza HTTP.
+        self.base_url = base_url
+        if http is None:
+            http = HTTP(
+                api_key=api_key,
+                api_secret=api_secret,
+                testnet=testnet,
+            )
+            if base_url:
+                http.endpoint = base_url
+        self._http = http
 
     async def _run(self, fn, /, **kwargs):
         return await asyncio.to_thread(fn, **kwargs)