401 from /sse after upgrading to 1.7.0

[xwhysi]

Describe the bug
MCP stop working due to auth error after upgrading from 1.6.0 to 1.7.0

To Reproduce

mcp: FastMCP = FastMCP()

@mcp.tool()
def add_two_integers(a: int, b: int) -> int:
    """
    Adds two integers.

    Args:
        a (int): The first integer.
        b (int): The second integer.

    Returns:
        int: The sum of the two integers.
    """
    return a + b

app: FastAPI = FastAPI()

app.mount("/", mcp.sse_app())

Expected behavior
Above is a super simple example to bind mcp to fastapi, I start with uvicorn, it works just fine with 1.6.0 but stop working in 1.7.0 due to 401 from /sse. Here I'm not configuring any auth so expecting no auth check.

[ihrpr]

v1.7.1 should have the fix

[johnandersen777]

1.7.1 fix works for me