feat(V2): migrazione bybit completa (client, tools, router, test, builder)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/unit/test_exchanges_builder.py

@@ -22,6 +22,34 @@ async def test_build_client_deribit_returns_correct_url(monkeypatch):
     assert "test" not in c_live.base_url.lower()
 
 
+@pytest.mark.asyncio
+async def test_build_client_bybit_returns_correct_env(monkeypatch):
+    from tests.unit.test_settings import _minimal_env
+
+    for k, v in _minimal_env().items():
+        monkeypatch.setenv(k, v)
+
+    # Stub pybit HTTP per evitare connessione reale durante __init__
+    from cerbero_mcp.exchanges.bybit import client as bybit_client
+
+    class _FakeHTTP:
+        def __init__(self, **kwargs):
+            self.kwargs = kwargs
+
+    monkeypatch.setattr(bybit_client, "HTTP", _FakeHTTP)
+
+    from cerbero_mcp.settings import Settings
+    from cerbero_mcp.exchanges import build_client
+
+    s = Settings()
+    c_test = await build_client(s, "bybit", "testnet")
+    c_live = await build_client(s, "bybit", "mainnet")
+
+    assert c_test is not c_live
+    assert c_test.testnet is True
+    assert c_live.testnet is False
+
+
 @pytest.mark.asyncio
 async def test_build_client_unknown_exchange_raises(monkeypatch):
     from tests.unit.test_settings import _minimal_env