Throw exception for null RawHeader in HeaderQueryBehavior

Previously, the code continued execution when the RawHeader
property of the query result was null. This change introduces
an InvalidOperationException to handle this case, ensuring
that the absence of a valid RawHeader is treated as an error.
The exception message includes ProfileId and ActionId for
better debugging context.

src/ReC.Application/Common/Behaviors/HeaderQueryBehavior.cs

@@ -18,7 +18,9 @@ public class HeaderQueryBehavior<TRecAction>(IRecDbContext dbContext, ILogger<He
         var result = await dbContext.HeaderQueryResults.FromSqlRaw(action.HeaderQuery).FirstOrDefaultAsync(cancel);
 
         if(result?.RawHeader is null)
-            return await next(cancel);
+            throw new InvalidOperationException(
+                $"Header query did not return a result or returned a null REQUEST_HEADER. " +
+                $"ProfileId: {action.ProfileId}, ActionId: {action.ActionId}.");
 
         var headerDict = JsonSerializer.Deserialize<Dictionary<string, JsonElement>>(result.RawHeader);