Fix linting: use builtin OSError and TimeoutError instead of socket aliases

src/py_dvt_ate/instruments/transport/tcp.py

@@ -71,7 +71,7 @@ class TCPTransport(Transport):
             self._socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
             self._socket.settimeout(self._timeout)
             self._socket.connect((self._host, self._port))
-        except (socket.error, OSError) as err:
+        except OSError as err:
             self._socket = None
             raise ConnectionError(
                 f"Failed to connect to {self._host}:{self._port}: {err}"
@@ -108,7 +108,7 @@ class TCPTransport(Transport):
         try:
             message = f"{command}\n".encode(self._encoding)
             self._socket.sendall(message)
-        except (socket.error, OSError) as err:
+        except OSError as err:
             raise OSError(f"Write failed: {err}") from err
 
     def read(self, timeout: float | None = None) -> str:
@@ -151,9 +151,9 @@ class TCPTransport(Transport):
 
         except ConnectionError:
             raise  # Re-raise ConnectionError as-is
-        except socket.timeout as err:
+        except TimeoutError as err:
             raise TimeoutError("Read timeout") from err
-        except (socket.error, OSError, UnicodeDecodeError) as err:
+        except (OSError, UnicodeDecodeError) as err:
             raise OSError(f"Read failed: {err}") from err
         finally:
             # Restore original timeout

tests/unit/test_transport.py

@@ -64,7 +64,7 @@ class TestTCPTransport:
         """Test connection failure raises ConnectionError."""
         mock_sock = MagicMock()
         mock_socket_class.return_value = mock_sock
-        mock_sock.connect.side_effect = socket.error("Connection refused")
+        mock_sock.connect.side_effect = OSError("Connection refused")
 
         with pytest.raises(ConnectionError, match="Failed to connect"):
             transport.connect()
@@ -113,7 +113,7 @@ class TestTCPTransport:
         """Test write failure raises IOError."""
         mock_sock = MagicMock()
         mock_socket_class.return_value = mock_sock
-        mock_sock.sendall.side_effect = socket.error("Write failed")
+        mock_sock.sendall.side_effect = OSError("Write failed")
 
         transport.connect()
 
@@ -167,7 +167,7 @@ class TestTCPTransport:
         """Test read timeout raises TimeoutError."""
         mock_sock = MagicMock()
         mock_socket_class.return_value = mock_sock
-        mock_sock.recv.side_effect = socket.timeout("Timed out")
+        mock_sock.recv.side_effect = TimeoutError("Timed out")
 
         transport.connect()