Add new POST endpoint and update profileId type to long

Added a new HTTP POST endpoint `invoke/fake` in `RecActionController`
to invoke batch actions with a fake profile ID. Updated the `profileId`
parameter type in the `InvokeBatchRecAction` extension method from
`int` to `long` to support larger profile IDs. These changes improve
flexibility and introduce a new endpoint for specific use cases.

src/ReC.API/Controllers/RecActionController.cs

@@ -20,6 +20,13 @@ public class RecActionController(IMediator mediator) : ControllerBase
         return Accepted();
     }
 
+    [HttpPost("invoke/fake")]
+    public async Task<IActionResult> Invoke(CancellationToken cancel)
+    {
+        await mediator.InvokeBatchRecAction(FakeProfileId, cancel);
+        return Accepted();
+    }
+
     #region CRUD
     [HttpGet]
     public async Task<IActionResult> Get([FromQuery] long profileId, CancellationToken cancel) => Ok(await mediator.Send(new ReadRecActionQuery()