It's entirely up to you and to prevent disputes about what is and isn't included, it's a good idea to write down a definition of exactly what you will include.

Personally I would always include all work-related injuries to my organisation's own employees and I've never heard of anyone not doing so.  It is when it's someone else who is injured (for example, if the positions you describe were reversed and it was the operator's employee who was injured) that the debates tend to arise.

Personally, I would always include all people - whether employee, contractor, sub contractor, visitor, public, trespasser. Remember, you have to look at whether you have a duty of care to someone (any category of person), and whether that duty of care was breached. Also to note - if there was a breach (which could be an injury, destruction of property etc) then it can't be too remote. Not only is there a criminal breach (parliament law) but there are also civil breaches (civil law).  People can sue people, and it happens regularly. But people don't have money to be sued, so you can hold a company liable for damages. This is called vicarious liability. I would therefore log everything as every incident is a lesson whether you're at fault or not.  Always consider whether this happened on your premises or not, was the risk likely to happen. Could the consequence have been worse etc. it's always good practice to log it all because your good efforts could help someone in the future.