Fix MCP server startup: remove pre-run library init

Native library calls during startup interfered with FastMCP's
stdio transport initialization. Library is now loaded lazily on
first tool call instead.

src/cp210x_mcp/server.py

@@ -265,26 +265,6 @@ def lock_device(device_index: int = 0, confirm: bool = False) -> dict:
 
 def main():
     """Entry point for the MCP server."""
-    import sys
-
-    try:
-        from importlib.metadata import version
-        package_version = version("cp210x-mcp")
-    except Exception:
-        package_version = "0.1.0"
-
-    # Print to stderr only — stdout is reserved for JSON-RPC (MCP stdio transport)
-    print(f"CP210x MCP Server v{package_version}", file=sys.stderr)
-
-    try:
-        lib = get_lib()
-        num_devices = lib.get_num_devices()
-        print(f"  Found {num_devices} CP210x device(s)", file=sys.stderr)
-    except FileNotFoundError as e:
-        print(f"  Library not found: {e}", file=sys.stderr)
-    except Exception as e:
-        print(f"  Error initializing: {e}", file=sys.stderr)
-
     mcp.run()