Add birdcage-mcp FastMCP server for satellite dish control

34 tools (connection, movement, signal, system, satellite, console),
5 resources, 3 prompts. Backed by DemoDevice for offline testing.
46 tests passing against the demo backend via run_server_async.

mcp/tests/test_signal.py

@@ -0,0 +1,80 @@
+"""Tests for signal measurement tools."""
+
+import pytest
+from conftest import parse_result
+from fastmcp import Client
+
+
+@pytest.mark.anyio
+async def test_get_rssi_default(mcp_client: Client):
+    result = await mcp_client.call_tool("get_rssi", {})
+    data = parse_result(result)
+    assert data["reads"] == 10
+    assert isinstance(data["average"], int)
+    assert isinstance(data["current"], int)
+
+
+@pytest.mark.anyio
+async def test_get_rssi_custom_iterations(mcp_client: Client):
+    result = await mcp_client.call_tool("get_rssi", {"iterations": 5})
+    data = parse_result(result)
+    assert data["reads"] == 5
+
+
+@pytest.mark.anyio
+async def test_get_adc_rssi(mcp_client: Client):
+    result = await mcp_client.call_tool("get_adc_rssi", {})
+    data = parse_result(result)
+    assert "raw" in data
+
+
+@pytest.mark.anyio
+async def test_get_lock_status(mcp_client: Client):
+    result = await mcp_client.call_tool("get_lock_status", {})
+    data = parse_result(result)
+    assert "raw" in data
+    assert "Lock:" in data["raw"]
+
+
+@pytest.mark.anyio
+async def test_enable_lna(mcp_client: Client):
+    result = await mcp_client.call_tool("enable_lna", {})
+    data = parse_result(result)
+    assert data["status"] == "lna_enabled"
+    assert data["voltage"] == "13V"
+
+
+@pytest.mark.anyio
+async def test_get_dvb_config(mcp_client: Client):
+    result = await mcp_client.call_tool("get_dvb_config", {})
+    data = parse_result(result)
+    assert "BCM" in data["raw"]
+    assert "0x4515" in data["raw"]
+
+
+@pytest.mark.anyio
+async def test_get_channel_params(mcp_client: Client):
+    result = await mcp_client.call_tool("get_channel_params", {})
+    data = parse_result(result)
+    assert "Frequency" in data["raw"]
+
+
+@pytest.mark.anyio
+async def test_az_sweep(mcp_client: Client):
+    result = await mcp_client.call_tool(
+        "az_sweep",
+        {
+            "start_az": 195.0,
+            "span": 10.0,
+            "step_cdeg": 200,
+            "num_xponders": 1,
+        },
+    )
+    data = parse_result(result)
+    assert data["count"] > 0
+    assert len(data["points"]) == data["count"]
+    pt = data["points"][0]
+    assert "az" in pt
+    assert "rssi" in pt
+    assert "lock" in pt
+    assert "snr" in pt