✅ SignalR trigger for Azure Function (isolated) does not trigger.

using Microsoft.Azure.Functions.Worker;
using Microsoft.Azure.Functions.Worker.Http;
using Microsoft.Extensions.Logging;

namespace HueCue.API;

public class Api(ILogger<Api> logger)
{
    private const string HubName = "ChatRoom";

    [Function("negotiate")]
    public string Negotiate(
        [HttpTrigger(AuthorizationLevel.Anonymous, "post")]
        HttpRequestData req,
        [SignalRConnectionInfoInput(HubName = HubName, ConnectionStringSetting = "AzureSignalR")]
        string connectionInfo)
    {
        logger.LogInformation($"SignalR Connection data requested: {connectionInfo}");
        
        return connectionInfo;
    }
    
    [Function(nameof(SendMessage))]
    public void SendMessage(
        [SignalRTrigger(HubName,"messages", nameof(SendMessage), ConnectionStringSetting = "AzureSignalR")]
        SignalRInvocationContext invocationContext)
    {
        // Extract the message from the arguments
        var content = invocationContext.Arguments?.Length > 0 
            ? invocationContext.Arguments[0]?.ToString() 
            : "(no content)";
        
        logger.LogInformation($"SignalR Message received: {content}");
    }
}